Spinner can hang forever while stopping, when executed on fast rendering setups

[cardil]

On some fast rendering setups like:

• unit tests,
• background processes,
• pipe'ing output/input

the spinner could hang indefinitely on Quit(), and Wait() method:

client-pkg/pkg/output/tui/spinner.go

Lines 93 to 94 in 325b48c

	b.tea.Quit()
	b.tea.Wait()

See the goroutines dump: https://gist.github.com/cardil/039c0691d94b9537126b50361bbf9d3e

/kind bug

[cardil]

/assign