Fix admin consent for SP token retrieval flows in SPFx

There have been a couple of changes in SharePoint recently related to retrieving access tokens for your SharePoint Framework solutions. One of the changes is that MSAL V3 now uses the /_api/Microsoft.SharePoint.Internal.ClientSideComponent.Token.AcquireOBOToken API to retrieve the access token. Typically, this API was only used when loading your solution from Microsoft Teams, but it will now also be used when loading your solution from SharePoint.