ci: use appropriate cache paths for each ci jobs (elastic#15593)

dependency path defaults to the go.sum in the root folder.
use the systemtest go.sum for systemtests and tools go.sum for
packaging jobs

remove systemtest output junit file logic used back in the jenkins job

Author: kruskall

.github/workflows/ci.yml

@@ -61,21 +61,14 @@ jobs:
         with:
           go-version-file: systemtest/go.mod
           cache: true
+          cache-dependency-path: |
+            go.sum
+            systemtest/go.sum
       - run: docker compose up -d
       - env:
           GOTESTFLAGS: "-v -json"
-          OUTPUT_JSON_FILE: "build/TEST-go-system_tests.out.json"
-          OUTPUT_JUNIT_FILE: "build/TEST-go-system_tests.xml"
           GH_TOKEN: ${{ github.token }}
-        run: |
-          go run -modfile=tools/go.mod gotest.tools/gotestsum \
-          --no-color -f standard-quiet --jsonfile "$OUTPUT_JSON_FILE" --junitfile "$OUTPUT_JUNIT_FILE" \
-          --raw-command -- make system-test
-      - uses: actions/upload-artifact@v4  # upload test results
-        if: ${{ always() }} # run this step even if previous step failed
-        with:
-          name: test-results
-          path: 'build/*.xml'
+        run: make system-test
 
   test-package:
     runs-on: ubuntu-latest
@@ -85,6 +78,9 @@ jobs:
         with:
           go-version-file: go.mod
           cache: false
+          cache-dependency-path: |
+            go.sum
+            tools/go.sum
       - run: make package-snapshot
         env:
           GH_TOKEN: ${{ github.token }}
@@ -101,6 +97,9 @@ jobs:
         with:
           go-version-file: go.mod
           cache: false
+          cache-dependency-path: |
+            go.sum
+            tools/go.sum
       - name: Log in to the Elastic Container registry
         uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
         with:

.github/workflows/setup-cluster-env/action.yml

@@ -9,6 +9,7 @@ runs:
     - uses: actions/setup-go@v5
       with:
         go-version-file: go.mod
+        cache: true
         cache-dependency-path: |
           go.sum
           tools/go.sum