[Doc]: Example issues in Network

### Description

Following issues must be fixed

```
"Network","Remove-AzApplicationGatewayBackendSetting","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Remove-AzApplicationGatewayBackendSetting.md","Delete the prompt of example."
"Network","Remove-AzApplicationGatewayListener","0","MissingSynopsis","5040","1","Synopsis is missing.","Network\help\Remove-AzApplicationGatewayListener.md","Add Synopsis. Remove any placeholders."
"Network","Remove-AzApplicationGatewayListener","0","MissingDescription","5041","1","Description is missing.","Network\help\Remove-AzApplicationGatewayListener.md","Add Description. Remove any placeholders."
"Network","Remove-AzApplicationGatewayListener","1","MissingExampleCode","5044","1","Code of the example is missing.","Network\help\Remove-AzApplicationGatewayListener.md","Add code for the example. Remove any placeholders."
"Network","Remove-AzApplicationGatewayListener","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Remove-AzApplicationGatewayListener.md","Add description for the example. Remove any placeholders."
"Network","Remove-AzApplicationGatewayListener","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Remove-AzApplicationGatewayListener.md","Delete the prompt of example."
"Network","Remove-AzApplicationGatewayRoutingRule","0","MissingSynopsis","5040","1","Synopsis is missing.","Network\help\Remove-AzApplicationGatewayRoutingRule.md","Add Synopsis. Remove any placeholders."
"Network","Remove-AzApplicationGatewayRoutingRule","0","MissingDescription","5041","1","Description is missing.","Network\help\Remove-AzApplicationGatewayRoutingRule.md","Add Description. Remove any placeholders."
"Network","Remove-AzApplicationGatewayRoutingRule","1","MissingExampleCode","5044","1","Code of the example is missing.","Network\help\Remove-AzApplicationGatewayRoutingRule.md","Add code for the example. Remove any placeholders."
"Network","Remove-AzApplicationGatewayRoutingRule","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Remove-AzApplicationGatewayRoutingRule.md","Add description for the example. Remove any placeholders."
"Network","Remove-AzApplicationGatewayRoutingRule","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Remove-AzApplicationGatewayRoutingRule.md","Delete the prompt of example."
"Network","Remove-AzRoutingPolicy","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Remove-AzRoutingPolicy.md","Add description for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayBackendSetting","0","MissingSynopsis","5040","1","Synopsis is missing.","Network\help\Set-AzApplicationGatewayBackendSetting.md","Add Synopsis. Remove any placeholders."
"Network","Set-AzApplicationGatewayBackendSetting","0","MissingDescription","5041","1","Description is missing.","Network\help\Set-AzApplicationGatewayBackendSetting.md","Add Description. Remove any placeholders."
"Network","Set-AzApplicationGatewayBackendSetting","1","MissingExampleCode","5044","1","Code of the example is missing.","Network\help\Set-AzApplicationGatewayBackendSetting.md","Add code for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayBackendSetting","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Set-AzApplicationGatewayBackendSetting.md","Add description for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayBackendSetting","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Set-AzApplicationGatewayBackendSetting.md","Delete the prompt of example."
"Network","Set-AzApplicationGatewayListener","0","MissingSynopsis","5040","1","Synopsis is missing.","Network\help\Set-AzApplicationGatewayListener.md","Add Synopsis. Remove any placeholders."
"Network","Set-AzApplicationGatewayListener","0","MissingDescription","5041","1","Description is missing.","Network\help\Set-AzApplicationGatewayListener.md","Add Description. Remove any placeholders."
"Network","Set-AzApplicationGatewayListener","1","MissingExampleCode","5044","1","Code of the example is missing.","Network\help\Set-AzApplicationGatewayListener.md","Add code for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayListener","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Set-AzApplicationGatewayListener.md","Add description for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayListener","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Set-AzApplicationGatewayListener.md","Delete the prompt of example."
"Network","Set-AzApplicationGatewayRoutingRule","0","MissingSynopsis","5040","1","Synopsis is missing.","Network\help\Set-AzApplicationGatewayRoutingRule.md","Add Synopsis. Remove any placeholders."
"Network","Set-AzApplicationGatewayRoutingRule","0","MissingDescription","5041","1","Description is missing.","Network\help\Set-AzApplicationGatewayRoutingRule.md","Add Description. Remove any placeholders."
"Network","Set-AzApplicationGatewayRoutingRule","1","MissingExampleCode","5044","1","Code of the example is missing.","Network\help\Set-AzApplicationGatewayRoutingRule.md","Add code for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayRoutingRule","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Set-AzApplicationGatewayRoutingRule.md","Add description for the example. Remove any placeholders."
"Network","Set-AzApplicationGatewayRoutingRule","1","NeedDeleting","5051","1","The prompt of example need to be deleted.","Network\help\Set-AzApplicationGatewayRoutingRule.md","Delete the prompt of example."
"Network","Set-AzRoutingPolicy","1","MissingExampleDescription","5046","1","Description of the example is missing.","Network\help\Set-AzRoutingPolicy.md","Add description for the example. Remove any placeholders."
"Network","Add-AzApplicationGatewayBackendSetting","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Add-AzApplicationGatewayListener","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Add-AzApplicationGatewayRoutingRule","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Get-AzApplicationGatewayBackendSetting","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Get-AzApplicationGatewayListener","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Get-AzApplicationGatewayRoutingRule","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","New-AzApplicationGatewayBackendSetting","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","New-AzApplicationGatewayListener","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","New-AzApplicationGatewayRoutingRule","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","New-AzPacketCaptureScopeConfig","1","Invalid_Parameter_Name","5011","1","New-AzNetworkWatcherPacketCaptureV2 -TimeLimitInSeconds is not a valid parameter name.","-TimeLimitInSeconds","Check validity of the parameter -TimeLimitInSeconds."
"Network","New-AzPacketCaptureScopeConfig","2","Invalid_Parameter_Name","5011","1","New-AzNetworkWatcherPacketCaptureV2 -TimeLimitInSeconds is not a valid parameter name.","-TimeLimitInSeconds","Check validity of the parameter -TimeLimitInSeconds."
"Network","Remove-AzApplicationGatewayBackendSetting","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Remove-AzApplicationGatewayListener","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Remove-AzApplicationGatewayRoutingRule","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Set-AzApplicationGatewayBackendSetting","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Set-AzApplicationGatewayListener","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."
"Network","Set-AzApplicationGatewayRoutingRule","1","Invalid_Cmdlet","5000","1","Add is not a valid command name.","Add example code here","Check the spell of Add."

```