[ET-VK][ez] Fix undefined behaviour in ambiguous ParamsBuffer constructor
#7482
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…ructor ## Context I discovered this bug when trying to execute the `vulkan_compute_api_test` binary on Windows. Almost all the tests were failing, with compute shaders producing incorrect results. After bisecting the change, it turns out the culprit is #7015. The diff introduced an alternative templated constructor for `ParamsBuffer` which would initialize an empty UBO with a specified size instead of wrapping a pre-existing object. The issue is that these constructors are ambiguous because they both are template constructors and both only accept one argument. Therefore, the original constructor would be called when certain callsites intended to call the new constructor. This results in a UBO being created with an incorrect size, and resulted in the tensor's metadata being passed incorrectly into a compute shader. To fix, I added a dummy argument into the new constructor for disambiguation purposes. I also changed it so that it's not templated, since there's no reason for it to be templated. Differential Revision: [D67770791](https://our.internmc.facebook.com/intern/diff/D67770791/) ghstack-source-id: 260031108 Pull Request resolved: #7478
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/7482
Note: Links to docs will display an error until the docs builds have been completed. ❌ 1 New Failure, 5 PendingAs of commit f658a42 with merge base d3e58b0 ( NEW FAILURE - The following job has failed:
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #7478
^ Please use this as the source of truth for the PR details, comments, and reviews
ghstack PR base: https://github.com/pytorch/executorch/tree/gh/SS-JIA/159/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/159/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/main
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/SS-JIA/159/orig
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