perf(gatsby-cli): throttle progress bar, build much faster this way

[pvdz]

This change explicitly throttles the progress bar updates (tick and total) to be clamped to 10 fps max.

This drops the govbook benchmark from 210 seconds down to 140 seconds. Makes the build about as fast as with CI=true and GATSBY_LOGGER=yurnalist.

(Note: Many CI's automatically enable this so you won't see a difference there. But many people are unaware of the CI flag and this will make a huge difference for larger sites, or sites with many images.)

Fixes #15505
Fixes #17452
Fixes #17966
Fixes #18801

Relates to #17873
Relates to vadimdemedes/ink#212

[pieh]

Can we make sure in progressActivity.done() to flush any potential pending updates to make sure when activity finishes, the progress / total are set correctly?

Something like updateProgress(force: true), which will be no-op unless something is pending

[pvdz]

Done. Will now force flush pending updates before resolving the done()

[pieh]

LGTM

[pvdz]

Hmmm, I did not intend to skip cloud checks. The merge on green label seems to skip them. Good to know. I think it's fine for this one.

[vladar]

Published in gatsby-cli 2.8.15