workflows/publish-commit-bottles: set cache and temp to /mnt

.github/workflows/publish-commit-bottles.yml

@@ -241,6 +241,8 @@ jobs:
     runs-on: ${{inputs.large_runner && 'homebrew-large-bottle-upload' || 'ubuntu-22.04'}}
     container:
       image: ghcr.io/homebrew/ubuntu22.04:master
+      volumes:
+        - /mnt:/mnt
     permissions:
       id-token: write # for `generate build provenance`
       contents: write # for `generate build provenance`
@@ -296,6 +298,7 @@ jobs:
           HOMEBREW_GITHUB_PACKAGES_USER: brewtestbot
           HOMEBREW_GITHUB_PACKAGES_TOKEN: ${{secrets.HOMEBREW_CORE_GITHUB_PACKAGES_TOKEN}}
           EXPECTED_SHA: ${{needs.check.outputs.head_sha}}
+          LARGE_RUNNER: ${{inputs.large_runner}}
         run: |
           local_git_head="$(git rev-parse HEAD)"
           remote_git_head="$(git ls-remote origin "pull/$PR/head" | cut -f1)"
@@ -310,6 +313,13 @@ jobs:
             exit 1
           fi
 
+          if [ -z "${LARGE_RUNNER}" ] || [ "${LARGE_RUNNER}" == "false" ]
+          then
+            sudo install -o "$(id -u)" -d "$(id -g)" /mnt/homebrew
+            export HOMEBREW_CACHE=/mnt/homebrew/cache
+            export HOMEBREW_TEMP=/mnt/homebrew/temp
+          fi
+
           # Don't quote arguments that might be empty; this causes errors.
           brew pr-pull \
             --debug \