Make sure we mute/unmute logs at the correct times

[nkubala]

This change makes sure that in the dev loop, we:

• only mute logs whenever we're going to perform an action, and
• only unmute logs when we've successfully performed an action

Fixes #2530

[codecov]

Codecov Report

Merging #2592 into master will increase coverage by <.01%.
The diff coverage is 100%.

Impacted Files	Coverage Δ
pkg/skaffold/kubernetes/log.go	38.93% <ø> (ø)	⬆️
pkg/skaffold/runner/dev.go	67.61% <100%> (+1.61%)	⬆️
pkg/skaffold/jib/jib.go	77.41% <0%> (-1.08%)	⬇️