Invoke-MgGraphRequest Should Always Throw on Error

[peombwa]

Invoke-MgGraphRequest should always throw an exception when an error is encountered.

Repro Steps:

• Connect-MgGraph
• Run Invoke-MgGraphRequest -Uri "https://graph.microsoft.com/v1.0/sites/root/drives?test429=true" -ErrorAction Stop. The service will respond with retry-after header of 120 seconds. This exceeds the HTTPClient.Timeout default of 100 seconds.
• No exception is thrown even though the request timed out.