Remove nvcc arch flags from clangd

[Jacobfaib]

Description

clang does not understand -arch=native and thinks it is -march instead

Checklist

• New or existing tests cover these changes.
• The documentation is up to date with these changes.

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Reviewing files that changed from the base of the PR and between e7c9b65 and c31fdb9.

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• .clangd

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Improved CUDA tooling compatibility by correctly filtering GPU architecture compiler arguments.

Walkthrough

Changes

CUDA clangd filtering

Layer / File(s)	Summary
Update CUDA architecture flag filtering .clangd	The CompileFlags filter now strips --gpu-architecture* arguments instead of -arch* arguments.

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