Problem: tests: termdebug test may fail and leave temp file around
(Dominique Pellé)
Solution: only run balloon_show() if the function exists, validate
termdebug is running using the g: termdebug_is_running var,
use defer to delete temporary files
Only include:
- guard balloon_show() in the termdebug plugin
- wait for g:termdebug_is_running in Test_termdebug_basic()
The remaining upstream test cleanups do not apply here.
fixes: vim/vim#153342979cfc262
Co-authored-by: Christian Brabandt <cb@256bit.org>
AI-assisted: Codex
dff515205c
