Use commit at time executor is instantiated #1787

Job	Run time
GPU Tests	3m 10s
python 3.9 - Lint	45s
python 3.9 - Type check	4m 28s
python 3.9 - Build	1m 3s
python 3.9 - Style	32s
python 3.9 - Docs	2m 18s
python 3.9 - Test	4m 3s
python 3.9 - Datasets integration	32s
python 3.9 - PyTorch integration	1m 2s
python 3.9 - Transformers integration	1m 4s
python 3.9 - FairScale integration	39s
python 3.9 - W&B integration	4m 23s
python 3.9 - Beaker integration	3m 19s
python 3.9 - Flax integration	2m 48s
python 3.9 - GS integration	57s
python 3.9 - Example - train_lm	1m 34s
python 3.8 - Test	3m 18s
python 3.10 - Test	3m 19s
Release	0s
	39m 14s

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