Absorb built-in bean from cdi-integration

[edburns]

EE 11 caused the integration aspects in the CDI specification to be removed from CDI and placed into platform. Some of them are more logically located in component specifications.

Consider this one

A Jakarta EE or embeddable EJB container must provide the following built-in beans, all of which have qualifier `@Default`:

* a bean with bean type `jakarta.transaction.UserTransaction`, allowing injection of a reference to the JTA `UserTransaction`,

This issue requests the inclusion of this assertion so it can be removed from the platform spec. Please see jakartaee/platform#855 .

[tomjenkinson]

Hi @edburns please can you help clarify a little what is needed on the Jakarta Transactions side? Some spec wording?