Dashboard - CLI Commands aren't namespace-aware

[tkonieczny]

Describe the bug
All CLI commands in Dashboard aren't namespace-aware. CLI defaults to testkube namespace, so if Testkube is installed in different one it need to be specifically set. Correct namespace is returned by API (for example /info)

Expected behavior
--namespace should be displayed, and set to the correct namespace (if different than the default testkube):

- Test->CLI Commands
- Execution->CLI Commands
- TestSuite->CLI Commands

[rangoo94]

Fixed with kubeshop/testkube-dashboard#888