lang/opencoarrays: update to 2.10.1

ChangeLog: https://github.com/sourceryinstitute/OpenCoarrays/releases/tag/2.10.1

• Reorganize & rename subdirectories, remove dead code, and document archival code.
• Issue 762
• Fix imbalanced calloc/MPI_free_mem.
• Update the default GCC version to 12.1.0

PR: 270645
Reported by: miguel@gocobachi.dev (maintainer)