Reduce disk usage on bootstrap cache miss

.github/actions/checkout-submodules-and-bootstrap/action.yaml

@@ -28,6 +28,13 @@ runs:
       uses: ./.github/actions/bootstrap
       with:
         platform: ${{ inputs.platform }}
+    - name: Remove CIPD cache directory
+      # If there is a bootstrap-cache miss, and bootstrap installs CIPD itself,
+      # there is roughly 1.4GB that remains in this cache that is useless from
+      # this point onwards.
+      run: |
+        du -sh $HOME/.cipd-cache-dir/
+        rm -rf $HOME/.cipd-cache-dir/
     - name: Dump disk info after checkout submodule & Bootstrap
       shell: bash
       run: scripts/dump_diskspace_info.sh

scripts/setup/environment.json

@@ -1,7 +1,7 @@
 {
     "cipd_package_files": [
         "third_party/pigweed/repo/pw_env_setup/py/pw_env_setup/cipd_setup/arm.json",
-        "pigweed.json",
+        "scripts/setup/pigweed.json",
         "scripts/setup/python.json",
         "scripts/setup/zap.json"
     ],