Extend some Pstream, PstreamBuffers and globalIndex functionality

• extend mpiAllGather to include more standard types

• consolidate and revise PstreamBuffers exchange options. Now possible to request finished sends with NBX, independent of any static configurations

• some more globalIndex queries

• new copy_unpack functionality for CompactListList, which allows unpacking into existing storage.

changed milestone to %v2312

requested review from @andy

assigned to @Mattijs

• linux64 clang15 int32 DP compilation
• Alltest without new regressions.

added 3 commits

• 8fa853a1 - ENH: globalIndex and CompactListList improvements
• c5a9c46f - ENH: globalIndex contains(), findProcAbove(), findProcBelow() methods
• 6561945f - ENH: extend mpiAllGather to include integer and float types

Compare with previous version

added 5 commits

• 5e0cafa6 - 1 commit from branch develop
• ef201ecf - STYLE: adjust globalIndex/CompactListList overflow reporting
• cfb75264 - ENH: globalIndex and CompactListList improvements
• 3fd1b74b - ENH: globalIndex contains(), findProcAbove(), findProcBelow() methods
• 88182011 - ENH: extend mpiAllGather to include integer and float types

Compare with previous version

resolved all threads

approved this merge request

mentioned in commit 11ecf55a

merged