Do not set conda version in Jenkinsfile(s) (#8585) #321

Job	Run time
check / Load tox environments	5s
crds_contexts / retrieve latest CRDS contexts	7s
check / check-style (ubuntu-latest)	18s
check / check-security (ubuntu-latest)	25s
check / check-dependencies (ubuntu-latest)	1m 10s
test / Load tox environments	5s
test / py310-oldestdeps-xdist-cov (ubuntu-latest)	32m 14s
test / py310-xdist (ubuntu-latest)	20m 7s
test / py311-xdist (ubuntu-latest)	19m 2s
test / py311-xdist (macos-latest)	10m 20s
test / py311-xdist-cov (ubuntu-latest)	30m 54s
test / py312-xdist (ubuntu-latest)	21m 39s
	2h 16m 26s

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