Set-AzSqlServerActiveDirectoryAdministrator fails when using SPN

## Description
Set-AzSqlServerActiveDirectoryAdministrator calls endpoint graph.windows.net even **both** group name and object Id are supplied. Calling the API is not necessary when both arguments are supplied. Similar issue: https://github.com/Azure/azure-powershell/issues/13573

API is called multiple times but this call makes Cmdlet to fail ​`https://graph.windows.net/***/users/***d?api-version=1.6`

response:
```
Body:
{
​"odata.error": {
​"code": "Authorization_RequestDenied",
​"message": {
​"lang": "en",
​"value": "Insufficient privileges to complete the operation."
​},
​"requestId": "95277ba5-xxxx-xxxx-xxxx-7c456ffa071c",
​"date": "2021-10-26T16:18:44"
​}
}
```

Error message:
```
Set-AzSqlServerActiveDirectoryAdministrator: /home/vsts/work/1/artifactTemplate/AzureSQL/post-deploy.ps1:11
Line |
11 | Set-AzSqlServerActiveDirectoryAdministrator -ResourceGroupName $rg -S …
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| Cannot find the Azure Active Directory object
| 'tekdata-test-sql-admin'. Please make sure that the user or
| group or application you are authorizing is registered in the
| current subscription's Azure Active directory. To get a list
| of Azure Active Directory groups use Get-AzADGroup, or to get
| a list of Azure Active Directory users use Get-AzADUser or to
| get a list of Azure Active Directory applications use
| Get-AzADApplication.
```

## Steps to reproduce
run following with SPN
```powershell
Set-AzSqlServerActiveDirectoryAdministrator -ResourceGroupName xxx-azuresql-dev-rg -ServerName xxx-dev-sqlserver -DisplayName xxx-dev-sql-admin
```

## Environment data

```
Name Value
---- -----
PSVersion 7.1.5
PSEdition Core
GitCommitId 7.1.5
OS Linux 5.8.0-1042-azure #45~20.04.1-Ubuntu SMP W…
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
```

## Module versions

```powershell
6.4.0
```

## Debug output

```

```

## Error output

```

```