workflows/release-binaries: Fetch composite actions outside of default workspace (#100845)

Otherwise, the checkout step will override them.

Author: tstellar

.github/workflows/release-binaries.yml

@@ -156,17 +156,34 @@ jobs:
         sparse-checkout: |
           .github/workflows/
         sparse-checkout-cone-mode: false
+        # Check out outside of working directory so the source checkout doesn't
+        # remove it.
         path: workflows
 
-    - name: Setup Stage
-      id: setup-stage
-      uses: ./workflows/.github/workflows/release-binaries-setup-stage
+    # actions/checkout does not support paths outside of the GITHUB_WORKSPACE.
+    # Also, anything that we put inside of GITHUB_WORKSPACE will be overwritten
+    # by future actions/checkout steps.  Therefore, in order to checkout the
+    # latest actions from main, we need to first checkout out the actions inside of
+    # GITHUB_WORKSPACE (see previous step), then use actions/checkout to checkout
+    # the code being built and the move the actions from main back into GITHUB_WORKSPACE,
+    # becasue the uses on composite actions only reads workflows from inside GITHUB_WORKSPACE.
+    - shell: bash
+      run: mv workflows  ../workflows-main
 
     - name: Checkout LLVM
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       with:
         ref: ${{ needs.prepare.outputs.ref }}
 
+    - name: Copy main workflows
+      shell: bash
+      run: |
+        mv ../workflows-main .
+
+    - name: Setup Stage
+      id: setup-stage
+      uses: ./workflows-main/.github/workflows/release-binaries-setup-stage
+
     - name: Setup sccache
       uses: hendrikmuhs/ccache-action@ca3acd2731eef11f1572ccb126356c2f9298d35e # v1.2.9
       with:
@@ -194,7 +211,7 @@ jobs:
         ls -ltr ${{ steps.setup-stage.outputs.build-prefix }}/build
     
     - name: Save Stage
-      uses: ./workflows/.github/workflows/release-binaries-save-stage
+      uses: ./workflows-main/.github/workflows/release-binaries-save-stage
       with:
         build-prefix: ${{ steps.setup-stage.outputs.build-prefix }}