status: no warnings for missing state

[nik123]

Fixes #4383 (again)

After PR #4398 it occured, that dvc status -c output is bloated and informs about "missing" files twice (took from #4398 (comment)):

$ dvc status -c -R .
WARNING: Some of the cache files do not exist neither locally nor on remote. Missing cache files:
name: data-in-cache2-not-in-remote.txt, md5: 599b9eea7a2c4f97be18c077d2df4789
	new:                data-in-cache-1-not-in-remote.txt
	missing:            data-in-cache-2-not-in-remote.txt

If missing is now an expected status, the WARNING is probably no longer needed. So it could just output something like:

$ dvc status -c  # Assumes default remote exists, otherwise -r myremote
new:                data-in-cache-1-not-in-remote.txt
missing:            data-in-cache2-not-in-remote.txt

The WARNING shouldn't shown for dvc status -c. However it should be shown for all other commands (fetch, gc, etc.). This PR implements such behavior.

P.R.: I didn't come up with anything better than adding log_missing=True param into dvc.data_cloud.DataCloud.status and passing it all the way down dvc.cache.local._make_status. It's ugly. If there any better way please inform me about it.

• ❗ I have followed the Contributing to DVC checklist.

• 📖 If this PR requires documentation updates, I have created a separate PR (or issue, at least) in dvc.org and linked it here.

issue in dvc.or repo already exist: iterative/dvc.org#1701

Thank you for the contribution - we'll try to review it as soon as possible. 🙏

[pared]

@nik123 the change looks good. I agree we should probably avoid passing down the flag, though I do not see any alternative as of now. Maybe its time we revisit #2957

[efiop]

We've been thinking about revisit logging/info interface for a long time, since passing a chain of such flags is not the prettiest thing ever 🙁 But there is no simple better way for now, so this will work for now 👍

[efiop]

Thank you @nik123 !