[ET-VK] Organize utils

[jorgep31415]

Stack from ghstack (oldest at bottom):

• -> [ET-VK] Organize utils #2323
• [ET-VK][EZ] Fix Android test linkage #2319

Refactor our OpUtils.*, StagingUtils.*, and Utils.* which have accumulated helper functions during the redesign.

We split them and move them into two new folders:

1. ops/utils: Used by files in ops/ and ops/impl/.
2. ops/impl/utils: Used only by files in ops/impl/.

In general, this helps to unflatten the ops/ directory:

[jorgep31415@devvm15882.vll0 /data/users/jorgep31415/fbsource/xplat/executorch/backends/vulkan/runtime/graph/ops (98b0e789c)]$ tree
.
├── ExecuteNode.cpp
├── ExecuteNode.h
├── impl
│   ├── Arithmetic.cpp
│   ├── Arithmetic.h
│   ├── Staging.cpp
│   ├── Staging.h
│   └── utils
│       ├── DimUtils.h
│       ├── ScalarUtils.h
│       ├── TensorUtils.cpp
│       └── TensorUtils.h
├── OperatorRegistry.cpp
├── OperatorRegistry.h
├── PrepackNode.cpp
├── PrepackNode.h
└── utils
    ├── BindingUtils.cpp
    ├── BindingUtils.h
    ├── StagingUtils.cpp
    └── StagingUtils.h

3 directories, 18 files

Since we're heavily updating include declarations, we also introduce the convention to only include the VK-API via

#include <ATen/native/vulkan/api/api.h>

instead of including more specific files, e.g.,

#include <ATen/native/vulkan/api/Tensor.h>

Differential Revision: D54690346

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/2323

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❌ 2 New Failures

As of commit 2a96ea8 with merge base 0b6add8 ():

NEW FAILURES - The following jobs have failed:

• Build documentation / build (buck2) / Build doc (gh)
  RuntimeError: Command docker exec -t a13cd68bc0f8383d8a1f92c4fc42a8df65b489c1432199cc701f0ffe446ec3db /exec failed with exit code 2
• pull / unittest / linux (buck2) / linux-job (gh)
  RuntimeError: Command docker exec -t 2f0fd1fcab7f40c796cb54b30ec35e59d59eed4e46556267535c3ae0268f04a8 /exec failed with exit code 1

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[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D54690346

[facebook-github-bot]

This pull request has been merged in ac8267b.