test(ws): add tests for workspace and workspaceKind controller loops

[Adembc]

This PR is still a work in progress, but I’d appreciate a review before completing all tests.

The tests covered in this PR include:

• Verifying that resources like Service and StatefulSet are created when a Workspace is created.
• Ensuring that reconciled resources are deleted and properly recreated.
• Checking that updated reconciled resources are reverted as expected.
• Validating that Go templates in WorkspaceKind's spec.podTemplate.extraEnv[].value function correctly:
  • Succeed with a valid portID.
  • Return an empty string for an invalid portID.
  • Set the Workspace to an error state for invalid template formats (e.g., using single quotes for the portID string).

[google-oss-prow]

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[thesuperzapper]

@Adembc I have not reviewed this PR, but I have rebased it so the tests will run.