HHH-18964 Remove obsolete JtaPlatforms

[gavinking]

As suggested by @sebersole, this PR removes support for SAP NetWeaver and Bitronix.

But surely this is just a start. Looks like we can remove a few more.

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https://hibernate.atlassian.net/browse/HHH-18964

[gavinking]

Everyone: do we need to rescue any of these????

[scottmarlow]

+1 as removing implementations that no longer are moving forward to new Persistence Spec versions looks right to me.

[gavinking]

Looks like we should rescue SunOneJtaPlatform (but rename it) since that's apparently what people use in Payara: https://blog.payara.fish/use-hibernate-as-a-jpa-provider-with-payara

(And Glassfish too.)

[gavinking]

@scottmarlow Which implementation of JtaPlatform is used in WildFly?

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[beikov]

It seems like some WebSphere platforms could be removed as well, since IBM WebSphere Liberty (the Jakarta version) is based on IBM OpenLiberty.

AFAIU, this means WebSphereExtendedJtaPlatform and WebSphereJtaPlatform are unnecessary.

[gavinking]

It seems like some WebSphere platforms could be removed as well

Yes, I know. One of the reasons I had not merged this yet is I wanted to check this with @ebullient.

[ebullient]

cc: @NottyCode