Use commit at time executor is instantiated #1783

Job	Run time
GPU Tests	6m 8s
python 3.9 - Lint	53s
python 3.9 - Type check	4m 16s
python 3.9 - Build	1m 0s
python 3.9 - Style	23s
python 3.9 - Docs	2m 29s
python 3.9 - Test	3m 37s
python 3.9 - Datasets integration	32s
python 3.9 - PyTorch integration	48s
python 3.9 - Transformers integration	1m 2s
python 3.9 - FairScale integration	38s
python 3.9 - W&B integration	4m 2s
python 3.9 - Beaker integration	2m 48s
python 3.9 - Flax integration	2m 57s
python 3.9 - GS integration	34s
python 3.9 - Example - train_lm	1m 17s
python 3.8 - Test	3m 23s
python 3.10 - Test	3m 18s
Release	0s
	40m 5s

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