Document Jakarta EE 11: Support Jakarta RESTful Web Services 4.0

[neenapj]

OpenLiberty/open-liberty#18740

Jakarta RESTful Web Services 4.0 feature (restfulWS-4.0) introduces general improvements to the the API by removing legacy bits (JAXB/ManagedBean), adding useful convenience methods, improving URI and JSON handling, strengthening tests, and aligning with Jakarta EE 11 practices.

Differences between RESTful Web Services 4.0 and RESTful Web Services 3.1

New Additions:

• Added containsHeaderString() method to ClientRequestContext, ClientResponseContext, ContainerRequestContext, ContainerResponseContext, and HttpHeaders
• Added APPLICATION_MERGE_PATCH_JSON and APPLICATION_MERGE_PATCH_JSON_TYPE to MediaType
• Added getMatchedResourceTemplate() method to UriInfo

Removals:

• Managed Beans: The support for @ManagedBean has been removed. Managed bean support is now part of CDI. #1216
• Removed Link.JaxbLink and Link.JaxbAdapter inner classes. #1226