workflows/release-binaries: Always pull composite actions from main branch (#100805)

If we pull from the release tag, then if there is a bug in one of the
actions on the release tag, then we can never do a build for that tag.
Pulling from main will allows us to fix bugs in the actions we use to
build the releases.

.github/workflows/release-binaries.yml

@@ -148,6 +148,20 @@ jobs:
     if: github.repository == 'llvm/llvm-project'
     runs-on: ${{ inputs.runs-on }}
     steps:
+
+    - name: Checkout Actions
+      uses: actions/checkout@@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      with:
+        ref: ${{ (github.event_name == 'pull_request' && github.sha) || 'main' }}
+        sparse-checkout: |
+          .github/workflows/
+        sparse-checkout-cone-mode: false
+        path: workflows
+
+    - name: Setup Stage
+      id: setup-stage
+      uses: ./workflows/.github/workflows/release-binaries-setup-stage
+
     - name: Checkout LLVM
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       with:
@@ -161,10 +175,6 @@ jobs:
         key: sccache-${{ runner.os }}-${{ runner.arch }}-release
         variant: sccache
 
-    - name: Setup Stage
-      id: setup-stage
-      uses: ./.github/workflows/release-binaries-setup-stage
-
     - name: Build Stage 1 Clang
       id: build
       shell: bash
@@ -184,7 +194,7 @@ jobs:
         ls -ltr ${{ steps.setup-stage.outputs.build-prefix }}/build
     
     - name: Save Stage
-      uses: ./.github/workflows/release-binaries-save-stage
+      uses: ./workflows/.github/workflows/release-binaries-save-stage
       with:
         build-prefix: ${{ steps.setup-stage.outputs.build-prefix }}