PublicClientApplicationBuilder - allow non-GUID client id for AuthorityType.Generic

[kurtanr]

Fixes #4686

Changes proposed in this request

• allowed non-GUID client ids for AuthorityType.Generic
• this allows usage of PublicClientApplicationBuilder with Identity Providers such as Duende IdentityServer or Keycloak

Testing

• added test for AcquireTokenInteractive in GenericAuthorityTests which uses Duende IdentityServer
• also manually tested with Keycloak

Performance impact

• no performance impact for existing functionality

Documentation

• [ ] All relevant documentation is updated.

[kurtanr]

@microsoft-github-policy-service agree

[bgavrilMS]

Test works locally, I am trying it out on https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/pull/4756