Unable to specify a weekly recurring schedule for Global Schedules

### Link to sample

https://learn.microsoft.com/en-us/rest/api/dtl/global-schedules/create-or-update?view=rest-dtl-2018-09-15&tabs=HTTP

### Library name and version

Rest API (management.azure.com) 2018-09-15

### Language of the Sample

- [X] C#/.NET
- [ ] Java
- [ ] JavaScript/TypedScript
- [ ] Python
- [ ] Golang
- [X] Other - Please specify in Issue details field

### Sample Issue Type

- [X] Sample not working
- [ ] Sample missing
- [ ] Do not understand sample

### Issue details

Currently it doesn't seem possible to specify a Global Schedule with a weekly recurrence. Daily works fine, but providing the weekly recurrence details results in an HTTP400 response that mentions the daily recurrence is missing.
Sample that produces the error:

> PUT https://management.azure.com/subscriptions//resourceGroups//providers/Microsoft.DevTestLab/schedules/shutdown-computevm-mycoolvm?api-version=2018-09-15

body:

`{
"location": "canadacentral",
"properties": {
"status": "Enabled",
"timeZoneId": "Hawaiian Standard Time",
"taskType": "ComputeVmShutdownTask",
"targetResourceId": "/subscriptions//resourceGroups//providers/Microsoft.Compute/virtualMachines/mycoolvm",
"weeklyRecurrence": {
"time": "0700",
"weekdays": [
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
]
}
}
}`

The response
`{
"error": {
"code": "MissingRequiredProperty",
"message": "Missing required property 'DailyRecurrence'."
}
}`

even if you specify the properties.dailyRecurrence value as such:

> PUT https://management.azure.com/subscriptions//resourceGroups//providers/Microsoft.DevTestLab/schedules/shutdown-computevm-mycoolvm?api-version=2018-09-15

body:
`{
"location": "canadacentral",
"properties": {
"status": "Enabled",
"timeZoneId": "Hawaiian Standard Time",
"taskType": "ComputeVmShutdownTask",
"targetResourceId": "/subscriptions//resourceGroups//providers/Microsoft.Compute/virtualMachines/mycoolvm",
"dailyRecurrence": {
"time": "0700"
},
"weeklyRecurrence": {
"time": "0700",
"weekdays": [
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
]
}
}
}`

The following HTTP 400 is returned:

`{
"error": {
"code": "ConflictingProperties",
"message": "Input only one of the properties among [WeeklyRecurrence, DailyRecurrence, HourlyRecurrence]. Entering more than one will cause a conflict."
}
}`

I can confirm that it works if you wish to specify only a daily schedule but there is no way that I can get it to add a weekly schedule

### Expected behavior

I would expect an HTTP 201 or 200 with a sample response similar to the example in the documentation:

`{
"properties": {
"status": "Enabled",
"taskType": "ComputeVmShutdownTask",
"weeklyRecurrence": {
"weekdays": [
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday"
],
"time": "0700"
},
"timeZoneId": "Hawaiian Standard Time",
"notificationSettings": {
"status": "Disabled",
"timeInMinutes": 0
},
"createdDate": "2020-12-29T22:54:54.9335182+00:00",
"provisioningState": "Succeeded",
"uniqueIdentifier": "{id}"
},
"id": "/subscriptions/{subscriptionId}/resourcegroups/resourceGroupName/providers/microsoft.devtestlab/labs/{labName}/schedules/labvmautostart",
"name": "LabVmAutoStart",
"type": "microsoft.devtestlab/labs/schedules",
"location": "{location}",
"tags": {
"tagName1": "tagValue1"
}
}`

### Actual behavior

An HTTP 400 is returned when only a weekly recurrence is specified:

`{
"error": {
"code": "MissingRequiredProperty",
"message": "Missing required property 'DailyRecurrence'."
}
}`

### Reproduction Steps

1. follow the link to the MS documentation here:
2. [https://learn.microsoft.com/en-us/rest/api/dtl/global-schedules/create-or-update?view=rest-dtl-2018-09-15&tabs=HTTP#code-try-0](url)
3. Sign in with your Azure Account that has a valid subscription.
4. Create a virtual machine
5. Fill in the request required form details and provide a request body that specifies a weekly recurrence schedule. Be sure to set taskType as a "ComputeVmShutdownTask":

`{
"location": "canadacentral",
"properties": {
"status": "Enabled",
"timeZoneId": "Hawaiian Standard Time",
"taskType": "ComputeVmShutdownTask",
"targetResourceId": "/subscriptions//resourceGroups//providers/Microsoft.Compute/virtualMachines/mycoolvm",
"dailyRecurrence": {
"time": "0700"
},
"weeklyRecurrence": {
"time": "0700",
"weekdays": [
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
]
}
}
}`

### Environment

_No response_

Start with the linked Global Schedules Create or Update documentation and reproduce the PUT request using the weeklyRecurrence body for a ComputeVmShutdownTask. Compare the documented weekly example with the API responses; done means the sample or API behavior is corrected so a weekly schedule can be created without conflicting or missing recurrence properties.

Written by the indexing model from the issue text.