(maint) Ensure docker-compose is installed on test runners

Docker-compose does not appear to be installed on ubuntu-latest runners. Ensure it is installed before bringing up test cluster.

Author: donoghuc

.github/actions/docker_setup/action.yaml

@@ -6,5 +6,6 @@ runs:
     - name: Bring up containers
       shell: bash
       run: |
+        sudo apt install docker-compose
         docker-compose -f spec/docker-compose.yml build --parallel
         docker-compose -f spec/docker-compose.yml up -d

.github/actions/sudo_setup/action.yaml

@@ -6,6 +6,7 @@ runs:
     - name: Bring up containers
       shell: bash
       run: |
+        sudo apt install docker-compose
         docker-compose -f spec/docker-compose.yml build --parallel
         docker-compose -f spec/docker-compose.yml up -d
     - name: Create non-sudo user