feat(Makefile): add optional WAIT=true env to until all operands are running (#1456)

[rohanKanojia]

What does this PR do?

• Introduced WAIT variable to wait until DevWorkspace Deployment becomes ready
• Added conditional shell logic to wait before proceeding

What issues does this PR fix or reference?

Fix #1456

Is it tested? How?

Run make install WAIT=true You'll see that it would wait for Deployments to get ready:

⌛ Waiting for DevWorkspace Operator deployments to get ready
Waiting for deployment "devworkspace-controller-manager" rollout to finish: 0 of 1 updated replicas are available...
deployment "devworkspace-controller-manager" successfully rolled out
Waiting for deployment "devworkspace-webhook-server" rollout to finish: 0 of 2 updated replicas are available...
Waiting for deployment "devworkspace-webhook-server" rollout to finish: 1 of 2 updated replicas are available...
deployment "devworkspace-webhook-server" successfully rolled out
✅ Installation Successful

Run it without any option, make install. You'll see that no waiting is performed:

service/devworkspace-controller-metrics created
deployment.apps/devworkspace-controller-manager created
devworkspaceoperatorconfig.controller.devfile.io/devworkspace-operator-config created
✅ Installation Successful

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

[dkwon17]

LGTM, thank you, merging

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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

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