Remove deprecated pkg_resources #3394

Job	Run time
pre-commit	49s
pretest (pylint)	1m 22s
pretest (doc8)	52s
pretest (docs)	4m 32s
test-dashboard-build	5m 56s
test-long-algos (ubuntu-latest, 3.8, nevergrad)	11m 24s
test-long-algos (ubuntu-latest, 3.8, hebo)	3m 35s
test-long-algos (ubuntu-latest, 3.8, ax)	5m 41s
mongodb	3m 2s
test (ubuntu-latest, 3.8)	54m 51s
test-long-algos (ubuntu-latest, 3.9, nevergrad)	11m 37s
backward-compatibility (mongodb)	10m 18s
test (ubuntu-latest, 3.9)	54m 30s
test-long-algos (ubuntu-latest, 3.9, hebo)	3m 41s
test_no_extras	37m 13s
backward-compatibility (pickleddb)	9m 38s
test (ubuntu-latest, 3.10)	54m 6s
test-long-algos (ubuntu-latest, 3.9, ax)	6m 26s
pypi	2m 8s
conda	1m 13s
	4h 42m 54s

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