add workspace environment support #22625

Job	Run time
Ensure PR has a category label	3s
Classify changes	3s
Bootstrap Pants, test Rust (macOS11-x86_64)	28m 29s
Bootstrap Pants, test Rust (Linux-ARM64)	11m 33s
Bootstrap Pants, test and lint Rust (Linux-x86_64)	17m 56s
Build wheels (Linux-ARM64)	0s
Ensure PR has release notes	1s
Build wheels (Linux-x86_64)	0s
Build wheels (macOS11-ARM64)	0s
Build wheels (macOS10-15-x86_64)	0s
Test Python (Linux-ARM64)	3m 11s
Test Python (Linux-x86_64) Shard 2/10	15m 15s
Test Python (Linux-x86_64) Shard 1/10	15m 26s
Test Python (Linux-x86_64) Shard 0/10	17m 25s
Lint Python and Shell	3m 32s
Test Python (Linux-x86_64) Shard 3/10	15m 36s
Test Python (Linux-x86_64) Shard 4/10	25m 29s
Test Python (Linux-x86_64) Shard 5/10	11m 49s
Test Python (Linux-x86_64) Shard 6/10	9m 32s
Test Python (Linux-x86_64) Shard 7/10	15m 2s
Test Python (Linux-x86_64) Shard 8/10	13m 3s
Test Python (Linux-x86_64) Shard 9/10	10m 27s
Test Python (macOS11-x86_64)	12m 8s
Set Merge OK	1s
Merge OK	1s
	3h 46m 2s

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