Migrate executorch vulkan-headers dep

[ocvh]

Summary: Update vulkan-headers dependency in executorch vulkan targets.bzl to use the proper path

Reviewed By: mboyd

Differential Revision: D97210564

cc @SS-JIA @manuelcandales @digantdesai @cbilgin

[pytorch-bot]

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⚠️ 2 Awaiting Approval, 2 Unrelated Failures

As of commit a8268ee with merge base 3906b58 ():

AWAITING APPROVAL - The following workflows need approval before CI can run:

• Build Cadence (gh)
• Lint (gh)

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 / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.
• pull / unittest-editable / windows / windows-job (gh) (trunk failure)
  ##[error]The operation was canceled.

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[meta-codesync]

@ocvh has exported this pull request. If you are a Meta employee, you can view the originating Diff in D97210564.

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