Updated to JDK 21, gradle 8, fixed tests

[TareqK]

Changes

This is a refactor that upgrades the mvc-common library to Jakarta EE6.0 and JDK 21, allowing use on more modern servers and libraries - the tests were also fixed to account for the expiration of tokens. The main changes were to the build and namespaces of imports - with some changes to the tests using regexes.

References

solves #111

Re-Does #138 because the company that forked it is no longer active.

Testing

• [x] This change adds test coverage
• [x] This change has been tested on the latest version of Java or why not

Checklist

• [x] I have read the Auth0 general contribution guidelines
• [x] I have read the Auth0 Code of Conduct
• [x] All existing and new tests complete without errors

Added Context

This will break the current API as it changes all the required args to another package. Will fail CI check for API Changes - but this is expected and part of the issue.