Added support for `script_env_variables` #1322

Job	Run time
ubuntu, Python 3.8, conda-standalone	26m 5s
ubuntu, Python 3.9, conda-standalone	31m 34s
ubuntu, Python 3.10, conda-standalone-nightly	25m 33s
ubuntu, Python 3.11, micromamba	23m 59s
macos, Python 3.8, conda-standalone-nightly	1s
macos, Python 3.10, micromamba	1s
macos, Python 3.11, conda-standalone	1s
windows, Python 3.8, conda-standalone	30m 49s
windows, Python 3.9, conda-standalone-nightly	31m 26s
windows, Python 3.10, conda-standalone	31m 36s
windows, Python 3.11, conda-standalone-nightly	31m 30s
Canary Build	1s
	3h 52m 36s

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