test : fix flaky failures in sync_test by making sure non-empty string pointer is generated

[rohanKanojia]

What does this PR do?

Previously in fuzzStringPtr, we were skipping assigning the value of the generated string was empty, meaning str remained nil. This was causing flaky behavior in the test as mergeConfig logic checks if the pointer is non-nil before merging a value.

The updated fuzzStringPtr function ensures that the pointer is always set and never set to an empty string. It guarantees that all fuzzed *string fields are non-nil and non-empty, ensuring mergeConfig includes them during merging.

We have a test for Proxy field values to cover nil proxy value scenarios:

devworkspace-operator/pkg/config/sync_test.go

Line 359 in f45fd01

func TestMergeConfigHandlesProxySettings(t *testing.T) {

I've added similar tests for other *string fields like StorageClassName and RuntimeClassName

What issues does this PR fix or reference?

Fix #1443

Is it tested? How?

I ran this test over 50 times, and it seems to pass on all attempts with these changes.

As per old changes, I saw 8 failures on 50 runs.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[rohanKanojia]

/ok-to-test

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dkwon17, rohanKanojia

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[dkwon17]

Thank you!