Add torchcompile_xentropy executor #5899

Job	Run time
pytester (ubuntu-22.04, 3.10, latest, core)	12m 5s
pytester (ubuntu-22.04, 3.10, latest, ops)	12m 48s
pytester (ubuntu-22.04, 3.10, latest, grads)	21m 33s
pytester (ubuntu-22.04, 3.10, nightly, core)	11m 29s
pytester (ubuntu-22.04, 3.10, nightly, ops)	12m 6s
pytester (ubuntu-22.04, 3.10, nightly, grads)	21m 20s
pytester (macOS-14, 3.10, latest, core)	9m 25s
pytester (macOS-14, 3.10, latest, ops)	10m 27s
pytester (macOS-14, 3.10, latest, grads)	20m 25s
pytester (macOS-14, 3.10, nightly, core)	11m 15s
pytester (macOS-14, 3.10, nightly, ops)	11m 17s
pytester (macOS-14, 3.10, nightly, grads)	18m 50s
pytester (windows-2022, 3.10, latest, core)	26m 39s
pytester (windows-2022, 3.10, nightly, core)	26m 7s
pytester (ubuntu-22.04, 3.11, latest)	14m 21s
pytester (ubuntu-22.04, 3.12, latest)	16m 2s
testing-guardian	1s
	4h 16m 10s

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