New-AzSqlDatabaseRestorePoint Missing Permission

### Description

We have a custom role with defined RBAC only for Resotre SQL Server Operation. After we gave all the relevant permission, we still got a specific permission error is missing called `Microsoft.Sql/servers/databases/restorePointsOperationResults/read` . When I checked the portal, there was no such permission available. There are no docs also there about this role.

### Issue script & Debug output

```PowerShell
{

  "error": {

    "code": "AuthorizationFailed",

    "message": "The client 'xxxxxx' with object id 'xxxx' does not have authorization to perform action 'Microsoft.Sql/servers/databases/restorePointsOperationResults/read' over scope '/subscriptions/xxxx/resourceGroups/gssqa-db-rg-01/providers/Microsoft.Sql/servers/sql/databases/synapsedbrefresh202307250405/restorePointsOperationResults/133379600050000000' or the scope is invalid. If access was recently granted, please refresh your credentials."

  }

}
```
```

### Environment data

```PowerShell
PSVersion 7.2.4
PSEdition Core
GitCommitId 7.2.4
OS Darwin 22.6.0 Darwin Kernel Version 22.6.0: Wed Jul 5 22:21:56 PDT 2023; root:…
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
Az.Accounts Module Version 2.12.5
Az.Sql Module version 4.9.0
```

### Error output

_No response_

Start with the New-AzSqlDatabaseRestorePoint entry point and the reported Microsoft.Sql/servers/databases/restorePointsOperationResults/read action, using the supplied Az.Sql 4.9.0 and PowerShell 7.2.4 environment. Compare the restore-point operation with the custom RBAC permissions; done means the missing permission is accounted for and the reported AuthorizationFailed error is resolved or clearly documented.

Written by the indexing model from the issue text.