Add initial Copilot instructions #684

Job	Run time
Upload debug artifacts after failure in analyze (linked)	2m 19s
Upload debug artifacts after failure in analyze (nightly-latest)	2m 54s
Upload debug artifacts after failure in analyze (stable-v2.20.3)	1m 51s
Upload debug artifacts after failure in analyze (default)	2m 9s
Download and check debug artifacts after failure in analyze	15s
	9m 28s

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