[Feature Request] Public API to extract TenantId out of Authority URL

[rabenshm]

Is your feature request related to a problem? Please describe.
As we have been requested to use only .WithTenantId on the request level instead of .WithAuthority we would like to have public API common code to get the TenantId out of the Authority Url

Describe the solution you'd like
As described

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A clear and concise description of any alternative solutions or features you've considered.

Additional context
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[bgavrilMS]

Probably a static stand-alone method. ClientApplicationBase.GetTenantId(Uri authority) or an extension method on string / Uri.

[pmaytak]

Released in 4.46.0