[ET-VK] Fixing conv2d dw incorrect output when stride != dilation issue.

[trivedivivek]

Stack from ghstack (oldest at bottom):

• -> [ET-VK] Fixing conv2d dw incorrect output when stride != dilation issue. #7571
• [ET-VK] Changing all conv 2d pw ints from uint16 to int since it slightly improves perf. #7545
• [ET-VK] Adding batch processing in x axis to conv2d dw shader by caching input texel for reuse. #7526
• [ET-VK] Adding a common utility function to calculate 3d output position based on unique index. #7522

This diff moves current implementation of conv2d dw as a special case when stride equals dilation in the Vulkan backend of Executorch, since that's the only time this kind of caching is possible.

If stride does not equal dilation the old implementation is used.

Differential Revision: D67908916

[pytorch-bot]

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❌ 1 New Failure

As of commit 5186361 with merge base 39e8538 ():

NEW FAILURE - The following job has failed:

• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/vulkan/runtime/graph/ops/impl/Convolution.cpp:

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[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D67908916

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[github-actions]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
Feel free to remove the Stale label if you feel this was a mistake.
If you are unable to remove the Stale label please contact a maintainer in order to do so.
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