[clang] [Clang][CodeGen] Emit alignment information for indirect arguments (PR #201999)

[Sayan Sivakumaran via cfe-commits]

sivakusayan wrote:

Okay, the six failing tests are fixed. I manually updated:

- `MatrixElementTypeCast.hlsl`
- `hlsl_resource_t.hlsl`
- `cbuffer_struct_passing.hlsl`
- `semantic-struct-2-output.hlsl`

https://github.com/llvm/llvm-project/pull/201999