Install git manually for pg_upgrade tests

.github/workflows/build_and_test.yml

@@ -264,6 +264,12 @@ jobs:
       old_pg_major: ${{ matrix.old_pg_major }}
       new_pg_major: ${{ matrix.new_pg_major }}
     steps:
+    - name: Install dependencies
+      run: |-
+        # update stretch repositories
+        # sed -i -e 's/deb.debian.org/archive.debian.org/g' -e 's|security.debian.org|archive.debian.org/|g' -e '/stretch-updates/d' /etc/apt/sources.list
+        apt update || true
+        apt install git -y
     - uses: actions/checkout@v3.5.0
     - uses: "./.github/actions/setup_extension"
       with: