Added support for `script_env_variables` #1314

Job	Run time
ubuntu, Python 3.8, conda-standalone	6m 53s
ubuntu, Python 3.9, conda-standalone	6m 54s
ubuntu, Python 3.10, conda-standalone-nightly	6m 53s
ubuntu, Python 3.11, micromamba	6m 52s
macos, Python 3.8, conda-standalone-nightly	6m 2s
macos, Python 3.10, micromamba	6m 48s
macos, Python 3.11, conda-standalone	6m 49s
windows, Python 3.8, conda-standalone	6m 46s
windows, Python 3.9, conda-standalone-nightly	6m 47s
windows, Python 3.10, conda-standalone	6m 45s
windows, Python 3.11, conda-standalone-nightly	6m 47s
Canary Build	1s
	1h 14m 17s

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