Install ninja as dependency in CI

.github/workflows/integration-tests.yml

@@ -25,6 +25,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip urllib3 setuptools_scm
+          sudo apt-get install ninja-build
       - name: clone fprime and gps-tutorial
         run: |
           git clone --recurse-submodules -b ${{ matrix.fprime-version }} https://github.com/nasa/fprime.git