[patch, fortran, doc] Mention new CONVERT options for POWER

Hi, as we say in German "Nicht documentiert ist nicht gemacht", if it is not documented, it wasn't done. So I thought it would be time to document the changes to the various ways of specifying CONVERT before gcc12 went out of the door, so here is a patch for that. If that goes in, I will also w

Re: [OG11-committed][stage1-patch] Fortran: Fix finalization resolution with deep copy (was: [Patch][Stage 1] Fortran/OpenMP: Support mapping of DT with allocatable components)

More testing found more issues. Instead of adding more band aid to the pre-existing band aid, which was extended before, let's try a different approach: Just ensure that all component types are resolved (which includes finalizers) before continuing with the derived type. This also resolves the fi