[clang] [llvm] [DirectX] Implement Shader Flags Analysis for ResMayNotAlias (PR #131070)

[Farzon Lotfi via cfe-commits]

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+// RUN: %clang_cc1 -res-may-alias -finclude-default-header -triple dxil-pc-shadermodel6.3-library -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s --check-prefix=FLAG
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farzonl wrote:

did you want to change these to `clang_dxc` aswell since you are making a dxc driver change?

https://github.com/llvm/llvm-project/pull/131070