[llvm] Add pre-merge workflow for HLSL testing (PR #122184)

[Chris B via llvm-commits]

================
@@ -0,0 +1,153 @@
+name: HLSL Test
+
+permissions:
+  contents: read
+
+on:
+  workflow_dispatch:
+    inputs:
+      LLVM-Ref:
+        description: 'Test Suite Branch'
+        required: false
+        default: 'main'
+        type: string
+      LLVM-branch:
+        description: 'LLVM Branch'
+        required: false
+        default: 'main'
+        type: string
+      DXC-branch:
+        description: 'DXC Branch'
+        required: false
+        default: 'main'
+        type: string
+      BuildType:
+        description: 'Build Type'
+        required: false
+        default: 'Release'
+        type: choice
+        options:
+        - Release
+        - RelWithDebInfo
+        - Debug
+      TestTarget:
+        required: false
+        default: 'check-hlsl'
+        type: string
+      Test-Clang:
+        required: true
+        type: choice
+        options:
+        - On
+        - Off
+      SKU:
+        required: true
+        type: choice
+        options:
+        - hlsl-metal
+      LLVM-ExtraCMakeArgs:
+        description: 'Extra CMake Args for LLVM'
+        required: false
+        default: ''
+        type: string
+  workflow_call:
+    inputs:
+      OffloadTest-branch:
+        description: 'Test Suite Branch'
+        required: false
+        default: 'main'
+        type: string
+      LLVM-branch:
+        description: 'LLVM Branch'
+        required: false
+        default: 'main'
+        type: string
+      DXC-branch:
+        description: 'DXC Branch'
+        required: false
+        default: 'main'
+        type: string
+      SKU:
+        required: true
+        type: string
+      BuildType:
+        description: 'Build Type'
+        required: false
+        default: 'Release'
+        type: string
+      Test-Clang:
+        required: false
+        default: 'On'
+        type: string
+      TestTarget:
+        required: false
+        default: 'check-hlsl'
+        type: string
+      LLVM-ExtraCMakeArgs:
+        description: 'Extra CMake Args for LLVM'
+        required: false
+        default: ''
+        type: string
----------------
llvm-beanz wrote:

I can strip down and simplify what is in the LLVM tree. They exist because they have all been used in the dispatch workflow on the test suite repo. It's useful for running one-off tests.

The workflow we use for LLVM pre-merge doesn't need that so I'll strip them down.

https://github.com/llvm/llvm-project/pull/122184