Use Go version associated with containerd release

This ensures that there isn't flakes with testing when go version doesn't match the release as experienced in containerd#147

Signed-off-by: James Sturtevant <jstur@microsoft.com>

.github/workflows/ci.yml

@@ -94,23 +94,29 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04]
-        containerd: [v1.6.21, v1.7.1]
+        containerd: [v1.6.22, v1.7.3]
 
     steps:
       - name: Checkout extensions
         uses: actions/checkout@v3
 
-      - uses: actions/setup-go@v4
-        with:
-          go-version: '1.20.4'
-
       - name: Checkout containerd
         uses: actions/checkout@v3
         with:
           repository: containerd/containerd
           path: src/github.com/containerd/containerd
           ref: ${{ matrix.containerd }}
 
+      - name: Get Go Version
+        run: |
+          go_version=$(awk -F': ' '/GO_VERSION/ {gsub(/"/, "", $2); print $2; exit}' .github/workflows/release.yml)
+          echo "GO_VERSION=$go_version" >> $GITHUB_ENV
+        working-directory: src/github.com/containerd/containerd
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '${{ env.GO_VERSION }}'
+
       - name: Install containerd
         env:
           GOFLAGS: -modcacherw