Factor Cortex-M FVP e2e job into a reusable workflow and add nightly #1194

Job	Run time
update-pytorch-commit-hash	3s
test-static-hf-llm-qnn-linux (smollm2_135m) / linux-job	5h 11m 53s
test-cortex-m-e2e-nightly / run (resnet8) / resnet8	12m 39s
test-cortex-m-e2e-nightly / run (mobilenet_v1_025) / mobilenet_v1_025	11m 57s
test-cortex-m-e2e-nightly / run (deep_autoencoder) / deep_autoencoder	12m 32s
test-cortex-m-e2e-nightly / run (ds_cnn) / ds_cnn	12m 27s
link-check / lint-file-size	13s
link-check / lint-urls	11s
link-check / lint-xrefs	14s
	6h 2m 9s

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