add workspace environment support #22619

Job	Run time
Ensure PR has a category label	5s
Classify changes	8s
Bootstrap Pants, test Rust (macOS11-x86_64)	17m 59s
Bootstrap Pants, test and lint Rust (Linux-x86_64)	10m 9s
Build wheels (Linux-ARM64)	0s
Bootstrap Pants, test Rust (Linux-ARM64)	5m 59s
Ensure PR has release notes	3s
Build wheels (macOS10-15-x86_64)	0s
Build wheels (Linux-x86_64)	0s
Build wheels (macOS11-ARM64)	0s
Test Python (Linux-ARM64)	3m 8s
Lint Python and Shell	3m 33s
Test Python (Linux-x86_64) Shard 1/10	14m 56s
Test Python (Linux-x86_64) Shard 0/10	16m 28s
Test Python (Linux-x86_64) Shard 2/10	16m 4s
Test Python (Linux-x86_64) Shard 3/10	14m 46s
Test Python (Linux-x86_64) Shard 4/10	25m 34s
Test Python (Linux-x86_64) Shard 5/10	11m 41s
Test Python (Linux-x86_64) Shard 6/10	9m 57s
Test Python (Linux-x86_64) Shard 7/10	14m 24s
Test Python (Linux-x86_64) Shard 8/10	12m 39s
Test Python (Linux-x86_64) Shard 9/10	10m 21s
Test Python (macOS11-x86_64)	12m 59s
Set Merge OK	1s
Merge OK	1s
	3h 20m 55s

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