[ET-VK][ez][testing] Fix tensor_no_copy_transpose_test crash with transposed matmul

[SS-JIA]

Summary:
The tensor_no_copy_transpose_test was crashing with a segmentation fault when
testing matrix multiplication with a virtually transposed tensor. The test
helper function record_matmul_texture3d() always used the matmul_naive shader
variant, even when mat2 was transposed, causing a shader variant mismatch that
led to invalid descriptor bindings and a crash in the NVIDIA Vulkan driver.

This change adds a mat2_is_transposed parameter (default=false) to
record_matmul_texture3d() to properly select between matmul_naive and
matmul_transposed_naive shader variants. The implementation now mirrors the
production code logic in MatMul.cpp which correctly handles this case.

Changes:

• Added mat2_is_transposed parameter to record_matmul_texture3d() declaration
• Rewrote record_matmul_texture3d() to select correct shader variant based on
  transpose flag and properly construct push constants
• Updated test call to pass mat2_is_transposed=true when needed

Impact:

• Eliminates the segmentation fault crash (SIGSEGV)
• Test suite now progresses 13 tests further (31 vs 18 tests before crash)
• Buffer storage path passes all assertions
• Texture3D storage completes without crash (numerical accuracy issues remain
  and require separate investigation)

Test Plan:
./cmake-out/backends/vulkan/test/vulkan_compute_api_test
--gtest_filter=VulkanComputeAPITest.tensor_no_copy_transpose_test

[pytorch-bot]

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❗ 1 Active SEVs

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• ROCm linux.rocm.gpu.gfx942.*.b runners switching providers

❌ 3 New Failures, 1 Unrelated Failure

As of commit 348b371 with merge base 0ee2f49 ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/vulkan/test/vulkan_compute_api_test.cpp:
• pull / test-multimodal-linux (gemma3-4b) / linux-job (gh)
  RuntimeError: Command docker exec -t 6beb8587cb408bb9aa51feb859547bcc2b9c732745e0e350aa73a4a993581d20 /exec failed with exit code 139
• pull / test-samsung-models-linux / linux-job (gh)
  test_inception_v3_fp16

UNSTABLE - The following job is marked as unstable, possibly due to flakiness on trunk:

• pull / android / run-emulator (gh) (#16137)
  Timeout waiting for emulator to boot.

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[meta-codesync]

@SS-JIA has imported this pull request. If you are a Meta employee, you can view this in D89687461.