Spring Security Missing support for urn:ietf:params:oauth:grant-type:jwt-bearer in ClientRegistrations

Describe the bug It would appear ClientRegistrations.withProviderConfiguration does not yet support urn:ietf:params:oauth:grant-type:jwt-bearer:

```java if (grantTypes != null && !grantTypes.contains(GrantType.AUTHORIZATION_CODE)) { throw new IllegalArgumentException( "Only AuthorizationGrantType.AUTHORIZATION_CODE is supported. The issuer \"" + issuer + "\" returned a configuration of " + grantTypes); } ````

Related to gh-9780