Add support for Vulkan lowering

[pssrawat]

Summary: Add support for Vulkan lowering along with HTP. This ensures that we use the same optimizations for all backends.

Differential Revision: D85087953

cc @SS-JIA @manuelcandales @digantdesai @cbilgin

[pytorch-bot]

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❗ 1 Active SEVs

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• AWS was down, GHA infrastructure effected / recovering

❌ 6 New Failures, 4 Unrelated Failures

As of commit e606c05 with merge base d2aa141 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t d9555d334d497ee6cab4c9d91815a72e706735ac6955e6ed519bd497cb54cec3 /exec failed with exit code 1
• pull / unittest-nxp-neutron / linux-job (gh)
  RuntimeError: Command docker exec -t 837b0c1e717cb60791b36781bf18c67df9ed64631fdd91956d6ce149cb5777ef /exec failed with exit code 1
• Test CUDA Builds / export-voxtral-cuda-non-quantized / linux-job (gh)
  RuntimeError: Command docker exec -t 100e0693e8e8088d96eacfb819d912567e6f233d8508eb8128d0536700754cdb /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-tile-packed / linux-job (gh)
  RuntimeError: Command docker exec -t a3553a6d771ba4d148843f056e064f99da856c0b089e09f984e42c2349285750 /exec failed with exit code 2
• Test CUDA Builds / export-voxtral-cuda-quantized-int4-weight-only / linux-job (gh)
  RuntimeError: Command docker exec -t cb584aa557ee55661719331def954ae79f175ab23cae4f5b9380bcf334dcccea /exec failed with exit code 2
• Test Metal Backend / export-voxtral-metal-artifact / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128
• pull / test-models-linux (linear, portable, linux.2xlarge) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / linux / linux-job (gh) (trunk failure)
• pull / unittest-editable / linux / linux-job (gh) (trunk failure)

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[meta-codesync]

@pssrawat has exported this pull request. If you are a Meta employee, you can view the originating Diff in D85087953.

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