[clang] [HLSL] Make Matrix types in `buildInitializerListImpl` index in row major order for initializer lists. (PR #178931)

[Farzon Lotfi via cfe-commits]

farzonl wrote:

Failures are not related to this pr
```
Failed Tests (2):
  Clang :: Driver/hipspv-pass-plugin.hip
  Clang :: Driver/hipspv-toolchain.hip
```
Were also noticed on  swift ci bots https://ci.swift.org/job/llvm.org/job/clang-stage2-cmake-RgSan/1328/testReport/junit/Clang/Driver/hipspv_pass_plugin_hip/

and introduced by this PR: https://github.com/llvm/llvm-project/pull/178664
should be fixed by this revert: https://github.com/llvm/llvm-project/pull/178946

Will proceed with merging.

https://github.com/llvm/llvm-project/pull/178931