Attempt to reclaim some space on the github ubuntu runner. (broadinst…

…itute#8371)

* Reclaim some space on the github ubuntu runner so the CI WDL tasks don't run out of docker image disk space.

.github/workflows/gatk-tests.yml

@@ -292,6 +292,12 @@ jobs:
     continue-on-error: true
     name: WDL test ${{ matrix.wdlTest }} on cromwell
     steps:
+      #Reclaim some disk space on the runner to prevent the WDL tasks from running out of space on the docker.
+      #https://stackoverflow.com/questions/75536771/github-runner-out-of-disk-space-after-building-docker-image
+      - name: Reclaim some runner disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf "$AGENT_TOOLS_DIRECTORY"
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0