Python build and test

Downgrade to `python-ldap==3.4.3` in `poetry.lock` #4

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Run time

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Job	Run time
build-linux (3.8)	2m 59s
build-linux (3.9)	2m 57s
build-linux (3.10)	2m 56s
build-linux (3.11)	2m 52s
	11m 44s