Const-correctness, variable initialization, and error checking.

[AshkanAliabadi]

Stack from ghstack:

• Vulkan caching memory allocator. #42274 Vulkan caching memory allocator.
• Vulkan (source and binary) shader and shader layout cache. #42325 Abstract GLSL source and SPIRV binary shaders in one common construct.
• Refactor Vulkan context into its own files. Use RAII. #42273 Refactor Vulkan context into its own files. Use RAII.
• Const-correctness, variable initialization, and error checking. #42124 Const-correctness, variable initialization, and error checking.
• Add missing header guards. #42272 Add missing header guards.
• Add Vulkan Test to ATen Mobile Tests. #42123 Add Vulkan Test to ATen Mobile Tests.
• Disable validation layers in non-debug builds. #42122 Disable validation layers in non-debug builds.

Differential Revision: D22835543

[dr-ci]

💊 CI failures summary and remediations

As of commit 2e074b8 (more details on the Dr. CI page):

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✅ None of the CI failures appear to be your fault 💚

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• 1/1 tentatively recognized as flaky ❄️
  • Click here to rerun these jobs

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❄️ 1 failure tentatively classified as flaky

but reruns have not yet been triggered to confirm:

pytorch_windows_vs2019_py36_cpu_build (1/1)

Step: "Checkout code" (full log | diagnosis details | 🔁 rerun) ❄️

Writing SSH key for checkout to id_rsa

Creating .ssh directory
Adding the following entries to known_hosts:
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bitbucket.org ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAubiN81eDcafrgMeLzaFPsw2kNvEcqTKl/VqLat/MaB33pZy0y3rJZtnqwR2qOOvbwKZYKiEO1O6VqNEBxKvJJelCq0dTXWT5pbO2gDXC6h6QDXCaHo6pOHGPUy+YBaGQRGuSusMEASYiWunYN0vCAI8QaXnWMXNMdFP3jHAJH0eDsoiGnLPBlBp4TNm6rYI74nMzgz3B9IikW4WVK+dc8KZJZWYjAuORU3jc1c/NPskD2ASinf8v3xnfXeukU0sJ5N6m5E8VLjObPEO+mN2t/FZTMZLiFqPWc/ALSqnMnnhwrNi2rbfg/rd/IpL8Le3pSBne8+seeFVBoGqzHM9yXw==

Writing SSH key for checkout to id_rsa

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@AshkanAliabadi merged this pull request in ce54632.