Add validation and testing steps

This adds linting, code generation, dependencies validation and unit +
integration tests prior to producing a new release.

.github/workflows/release-fleet.yml

@@ -40,11 +40,13 @@ jobs:
           go-version-file: 'go.mod'
           check-latest: true
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v4.0.0
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always
+          # use the latest patch version.
+          version: v1.55
+          args: --timeout=10m --config=.golangci.json
 
 #      - name: Run FOSSA scan
 #        uses: fossas/fossa-action@v1.3.1
@@ -57,6 +59,29 @@ jobs:
 #          api-key: ${{ secrets.FOSSA_API_KEY }}
 #          run-tests: true
 
+      - name: Build Fleet binaries
+        run: ./.github/scripts/build-fleet-binaries.sh
+
+      - name: Check for code changes
+        run: |
+          ./.github/scripts/check-for-auto-generated-changes.sh
+          go mod verify
+
+      - name: Run unit tests
+        run: go test -cover -tags=test $(go list ./... | grep -v -e /e2e -e /integrationtests)
+
+      - name: Run integration tests
+        env:
+          SETUP_ENVTEST_VER: v0.0.0-20240115093953-9e6e3b144a69
+          ENVTEST_K8S_VERSION: 1.28
+        run: ./.github/scripts/run-integration-tests.sh
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log into Container registry
         uses: docker/login-action@v3
         with: