Get-AzDataProtectionPolicyTemplate -DatasourceType AzureDatabaseForPostgreSQL not working

### Description

I am trying to execute below command as part of my script but it fails.
Get-AzDataProtectionPolicyTemplate -DatasourceType AzureDatabaseForPostgreSQL

[51](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:52)Get-AzDataProtectionPolicyTemplate: /home/runner/work/_temp/ff25746d-1e43-4e99-b56a-7db060b5bcb1.ps1:12
[52](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:53)Line |
[53](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:54) 12 | Get-AzDataProtectionPolicyTemplate
[54](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:55) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[55](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:56) | Cannot process command because of one or more missing mandatory
[56](https://github.com/Maersk-Global/Athena_Backup_Restore/actions/runs/8964959796/job/24617578726#step:6:57) | parameters: DatasourceType.

NOTE : I am able to run this on Azure CLoudShell and PowerShell, hence doesnt seems to be cmdlet issue but platform.

### Issue script & Debug output

```PowerShell
Get-AzDataProtectionPolicyTemplate -DatasourceType AzureDatabaseForPGFlexServer
```

### Environment data

```PowerShell
Latest
```

### Module versions

```PowerShell
2.3.0
```

### Error output

```PowerShell
na
```

Start by reproducing Get-AzDataProtectionPolicyTemplate with AzureDatabaseForPostgreSQL and AzureDatabaseForPGFlexServer using Az module 2.3.0 in the reported execution environment, then compare the behavior with Azure CloudShell and PowerShell. Done means the datasource parameter is accepted consistently in the affected environment and the reported command completes without the missing-parameter error.

Written by the indexing model from the issue text.