fix(turbopack): Suppress logging for short no-op turbopack HMRs (#76924)
Turbopack tends to generate a lot of irrelevant `BUILDING` actions, as it reports *any* compilation, including fully no-op/cached compilations and those unrelated to HMR. Fixing this would require significant architectural changes.
This PR works around the problem by deferring any "rebuilding" message by 100ms. If we get a `BUILT` event within that threshold and nothing has changed, just suppress the message entirely.
Tested this with a noisy v0 repro that @henryjeff shared with me a few weeks ago (noise is caused by an API route that's polled):

I also tested this with a pages router site (`pyra-docs` in `front`) to sanity check there.