Add versioning to PoST data directory via postdata_metadata.json file #1139

Job	Run time
quicktests	23s
lint	19s
coverage	57s
unittests (ubuntu-22.04)	1m 31s
unittests (ubuntu-latest-arm-8-cores)	2m 13s
unittests (macos-13)	1m 14s
unittests (self-hosted, macos, arm64)	1m 7s
unittests (windows-2022)	3m 7s
Build postcli (ubuntu-22.04)	37s
Build postcli (ubuntu-latest-arm-8-cores)	1m 14s
Build postcli (macos-13)	39s
Build postcli (self-hosted, macos, arm64)	25s
Build postcli (windows-2022)	1m 39s
Publish release	0s
	15m 25s

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