Missing refresh token when using client credentials

The access token doesn't have a refresh token if we use client_credentials as grant_type - however the OAuthAccessTokenProvider tries to refresh the token if it's expired instead of requesting a new one, which results in this error:

oauth2-2.0.9/lib/oauth2/access_token.rb:118:in `refresh': A refresh_token is not available (RuntimeError)
microsoft_kiota_authentication_oauth-0.8.0/lib/microsoft_kiota_authentication_oauth/oauth_access_token_provider.rb:66:in `block in get_authorization_token'

This happens here: https://github.com/microsoft/kiota-authentication-oauth-ruby/blob/main/lib/microsoft_kiota_authentication_oauth/oauth_access_token_provider.rb#L66

This could be addressed by simply checking if a refresh token is available here: https://github.com/microsoft/kiota-authentication-oauth-ruby/blob/main/lib/microsoft_kiota_authentication_oauth/oauth_access_token_provider.rb#L65

if token.expired? && !token.refresh_token.nil?

Then it would automatically request a new token instead of trying to refresh it.

Start in lib/microsoft_kiota_authentication_oauth/oauth_access_token_provider.rb around lines 65-66 and inspect how expired client-credentials tokens are handled. Reproduce the expired-token case and verify that a token without a refresh token requests a new access token instead of raising the reported refresh error.