Move docker output to toolchain dir

Author: LegNeato

.github/workflows/container_images.yml

@@ -18,6 +18,8 @@ jobs:
   build-toolchain:
     name: Build LLVM7 base (${{ matrix.variance.name }} / ${{ matrix.platform.arch }})
     runs-on: ${{ matrix.platform.runner }}
+    env:
+      TOOLCHAIN_TAR_DIR: ${{ runner.tool_cache }}/llvm7-tars
     permissions:
       contents: read
       packages: write
@@ -76,6 +78,8 @@ jobs:
           echo "TMPDIR=${RUNNER_TEMP}/buildkit-tmp" >> "$GITHUB_ENV"
           echo "BUILDKIT_TMPDIR=${RUNNER_TEMP}/buildkit-tmp" >> "$GITHUB_ENV"
           echo "BUILDKIT_SANDBOX_TMPDIR=${RUNNER_TEMP}/buildkit-tmp" >> "$GITHUB_ENV"
+      - name: Prepare tar output directory
+        run: mkdir -p "$TOOLCHAIN_TAR_DIR"
       - name: Build and push toolchain
         id: toolchain-build
         uses: docker/build-push-action@v6
@@ -89,7 +93,7 @@ jobs:
             ${{ env.REGISTRY }}/${{ matrix.variance.toolchain_image }}:ci-${{ github.run_id }}-${{ matrix.platform.arch }}
           outputs: |
             type=image,name=${{ env.REGISTRY }}/${{ matrix.variance.toolchain_image }},push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
-            type=docker,dest=${{ runner.temp }}/${{ matrix.variance.toolchain_artifact }}-${{ matrix.platform.arch }}.tar
+            type=docker,dest=${{ env.TOOLCHAIN_TAR_DIR }}/${{ matrix.variance.toolchain_artifact }}-${{ matrix.platform.arch }}.tar
           cache-from: type=gha
       - name: Export digest
         if: github.event_name != 'pull_request'
@@ -109,7 +113,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.variance.toolchain_artifact }}-${{ matrix.platform.arch }}
-          path: ${{ runner.temp }}/${{ matrix.variance.toolchain_artifact }}-${{ matrix.platform.arch }}.tar
+          path: ${{ env.TOOLCHAIN_TAR_DIR }}/${{ matrix.variance.toolchain_artifact }}-${{ matrix.platform.arch }}.tar
           if-no-files-found: error
           retention-days: 1
       - name: Clean up caches