Enable toolcache cleanup in the multi-language PR check

The check installs the tools from a URL, so most versions in its matrix are downloaded rather than found in the toolcache, which is when the cleanup runs, and it then builds and analyses seven languages, so a bundle we damaged on the way in would show up.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

.github/workflows/__multi-language-autodetect.yml

@@ -191,5 +191,6 @@ jobs:
             exit 1
           fi
     env:
+      CODEQL_ACTION_CLEANUP_TOOLCACHE_BUNDLES: true
       CODEQL_ACTION_RESOLVE_SUPPORTED_LANGUAGES_USING_CLI: true
       CODEQL_ACTION_TEST_MODE: true

pr-checks/checks/multi-language-autodetect.yml

@@ -15,6 +15,7 @@ operatingSystems:
       - stable-v2.21.4
       - stable-v2.22.4
 env:
+  CODEQL_ACTION_CLEANUP_TOOLCACHE_BUNDLES: true
   CODEQL_ACTION_RESOLVE_SUPPORTED_LANGUAGES_USING_CLI: true
 installGo: true
 installDotNet: true