ci: add e2e-build-test for compiling the e2e testsuite

When Go modules get updated, golangci-lint sometimes fails with weird
errors. One of the common causes seems to be that there is a dependency
breakage between modules that are only used within the e2e test suite. A
normal build of the cephcsi executable succeeds, but building ./e2e
would fail.

By adding a job to build the e2e.test executable, a clear error message
will be reported when there are package dependency conflicts.

Signed-off-by: Niels de Vos <ndevos@ibm.com>

.github/workflows/go-test.yaml

@@ -9,6 +9,13 @@ permissions:
   contents: read
 
 jobs:
+  e2e-build-test:
+    name: e2e-build-test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: e2e-build-test
+        run: make containerized-build TARGET=e2e.test
   go-test:
     name: go-test
     runs-on: ubuntu-latest