Validate database names

[seeforschauer]

Description

This PR is a part of #807.

• removed TestFindAndModifyEmptyCollectionName test as the same test already done in TestCollectionName.
• database test names generation changed from sign - to sign _ to conform the rules.

Error codes

Test Case	MongoDB	FerretDB	Comment
too long name	Invalid namespace specified, quoted	Invalid namespace, not quoted	specified word in MongoDB, quotation differs
$^%*&	Invalid namespace, not quoted	Invalid namespace, not quoted	equal

Dance PR FerretDB/dance#176.

Checklist

• I added tests for new functionality or bugfixes.
• I ran task all, and it passed.
• I added/updated comments for both exported and unexported top-level declarations (functions, types, etc).
• I checked comments rendering with task godocs.
• (for maintainers only) I set Reviewers, Assignee, Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[codecov]

Codecov Report

Merging #913 (3aa5611) into main (38f0537) will increase coverage by 0.00%.
The diff coverage is 53.57%.

@@           Coverage Diff           @@
##             main     #913   +/-   ##
=======================================
  Coverage   59.70%   59.70%           
=======================================
  Files         224      224           
  Lines       10184    10201   +17     
=======================================
+ Hits         6080     6091   +11     
- Misses       3393     3400    +7     
+ Partials      711      710    -1     

Impacted Files	Coverage Δ
internal/handlers/pg/msg_insert.go	39.39% <0.00%> (-2.55%)	⬇️
internal/handlers/pg/msg_update.go	50.94% <0.00%> (-1.32%)	⬇️
internal/handlers/pg/pgdb/settings.go	39.53% <ø> (ø)
internal/handlers/tigris/msg_update.go	0.00% <ø> (ø)
internal/handlers/pg/pgdb/databases.go	60.00% <62.50%> (+0.29%)	⬆️
internal/handlers/pg/msg_create.go	75.71% <100.00%> (+4.07%)	⬆️
internal/handlers/pg/pgdb/collections.go	60.17% <100.00%> (+1.91%)	⬆️
internal/handlers/pg/pgdb/tables.go	64.70% <100.00%> (ø)
internal/util/testutil/db.go	100.00% <100.00%> (ø)
internal/util/version/version.go	55.00% <0.00%> (-5.00%)	⬇️
... and 5 more

Flag	Coverage Δ
integration	61.89% <50.00%> (-0.01%)	⬇️
mongodb	18.88% <14.28%> (-0.08%)	⬇️
pg	61.85% <50.00%> (-0.01%)	⬇️
tigris	49.37% <ø> (ø)
unit	25.13% <21.42%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

[w84thesun]

LGTM

[rumyantseva]

A few things are not really clear to me, asked questions.

[rumyantseva]

P.S. @seeforschauer could you also check MsgUpdate? I think it calls collection creation somewhere under the hood as well.

[noisersup]

LGTM

[rumyantseva]

I have a couple of minor comments, but in general it looks good to me.

[seeforschauer]

I committed the suggested change and all 3 approvals were dismissed. can we do anything with It?

[rumyantseva]

I don't have critical comments, but I guess this PR might need a final look from @AlekSi

[AlekSi]

https://github.com/FerretDB/FerretDB/pull/913/files#r924907975

[AlekSi]