Core ML: emit a (1,520,520) int32 index map instead of (1,21,520,520) logits

Core ML: emit a (1,520,520) int32 index map instead of (1,21,520,520) logits

Core ML: emit a (1,520,520) int32 index map instead of (1,21,520,520) logits

Stop restating quantized, and drop the unused default

Core ML: drop the fp32 variant, fp16 is equivalent in task terms

Add backend config (ExecuTorch 1.4.1)

Add coreml export (ExecuTorch 1.4.1)

Add coreml export (ExecuTorch 1.4.1)

Add coreml export (ExecuTorch 1.4.1)

Add coreml export (ExecuTorch 1.4.1)