Inline o.e.jdt.launching.macosx

[HannesWell]

Currently the handling of VMInstalls for Mac, which have a special layout, is separated into the org.eclipse.jdt.launching.macosx bundle.
But as encountered repeatedly, this separation can cause difficulties to assemble a proper runtime, e.g. for tests since only the org.eclipse.jdt feature includes it and nothing else requires it.
Looking at the code and dependencies I see nothing that would cause harm on other platforms than Mac and all (in-directed) calls to it are already guarded by an OS check. And since there are only a few classes I wonder:
Can the org.eclipse.jdt.launching.macosx bundle be in-lined into org.eclipse.jdt.launching?

And similarly could org.eclipse.jdt.launching.ui.macosx be inlined too? Maybe into org.eclipse.jdt.debug.ui?

Maybe @stephan-herrmann or @iloveeclipse can answer this?

If there's no compelling reason speaking against it, I can provide a PR to move the content.

[merks]

That would seem simpler. I just wanted to draw attention to the following with respect to nothing else requires it: