Cover important points in docs regarding Removing /Re-adding a Test Case in a Run

[yaroslavdrobushenko-art]

to cover questions like:

• How can a test case that was removed from a run be added back to the run?

[YanaBaranova0909]

Why a re-added test doesn't return to the run?

Cause:
When a test is removed from a run, it isn't physically deleted — it's marked as "excluded", but it remains part of the run configuration. When the user adds the same test again, the system creates an "included" action and correctly returns "success," since the add operation itself completes without errors.
The issue is that the run configuration ends up holding both statuses at once — "excluded" and "included" — and excluded takes priority over included. As a result, the test doesn't physically appear in the run's test list, even though the add operation reported success.

How to fix it:

• If the test was only removed (not yet re-added):
  Go to Configuration details, find the removed test, and cancel the deletion. The test will reappear in the run.

• If the test was removed and then re-added (it now has both "removed" and "added" statuses — see screenshot):
  Click the "x" next to the "removed" status to clear the exclusion. The "added" status will then take effect, and the test will appear in the run.