Update profile.ps1 to include the Environment (if available) in Connect-AzAccount

This change will be required in all Functions' clients.

This is the current template:

```powershell
# Authenticate with Azure PowerShell using MSI.
# Remove this if you are not planning on using MSI or Azure PowerShell.
if ($env:MSI_SECRET -and (Get-Module -ListAvailable Az.Accounts)) {
Disable-AzContextAutosave -Scope Process | Out-Null
Connect-AzAccount -Identity
}
```

Propose change:
```powershell
# Authenticate with Azure PowerShell using MSI.
# Remove this if you are not planning on using MSI or Azure PowerShell.
if ($env:MSI_SECRET -and (Get-Module -ListAvailable Az.Accounts)) {
Disable-AzContextAutosave -Scope Process | Out-Null

$environmentName = (Get-AzEnvironment).Name
if ($environmentName)
{
Connect-AzAccount -Identity -Environment $environmentName
}
else
{
Connect-AzAccount -Identity
}
}
```