Test Metal Backend #12392

Job	Run time
CI run decision / decide	38s
Get changed files / get-changed-files	3s
test-executorch-metal-build / macos-job	6m 32s
test-metal-backend-modules / macos-job	10m 34s
test-metal-qwen35-moe-tiny / macos-job	9m 24s
export-model-metal-artifact (openai, whisper-large-v3-turbo, non-quantized) / macos-job	9m 0s
export-model-metal-artifact (mistralai, Voxtral-Mini-4B-Realtime-2602, quantized-int4-metal) / macos-job	16m 53s
export-model-metal-artifact (openai, whisper-small, non-quantized) / macos-job	8m 28s
export-model-metal-artifact (mistralai, Voxtral-Mini-3B-2507, quantized-int4-metal) / macos-job	11m 54s
export-model-metal-artifact (openai, whisper-large-v3-turbo, quantized-int4-metal) / macos-job	9m 0s
export-model-metal-artifact (openai, whisper-small, quantized-int4-metal) / macos-job	8m 45s
export-model-metal-artifact (nvidia, parakeet-tdt, non-quantized) / macos-job	10m 41s
export-model-metal-artifact (mistralai, Voxtral-Mini-3B-2507, non-quantized) / macos-job	1h 30m 29s
export-model-metal-artifact (nvidia, parakeet-tdt, quantized-int4-metal) / macos-job	11m 9s
test-model-metal-e2e	0s
	3h 23m 30s

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