Infinity values are not allowed in documents

[rumyantseva]

Description

Closes #1581.

This PR fixes document validation restriction that was implemented but wasn't mentioned in diff.md docs.

See also FerretDB/dance#265.

Readiness 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.
• I ensured that the title is good enough for the changelog.
• (for maintainers only) I set Reviewers (@FerretDB/core), Assignee, Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[vercel]

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Name	Status	Preview	Updated
ferret-db	✅ Ready (Inspect)	Visit Preview	Dec 5, 2022 at 3:33PM (UTC)

[codecov]

Codecov Report

Merging #1622 (a740c5e) into main (df54de4) will decrease coverage by 0.04%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1622      +/-   ##
==========================================
- Coverage   68.10%   68.05%   -0.05%     
==========================================
  Files         285      285              
  Lines       13767    13766       -1     
==========================================
- Hits         9376     9369       -7     
- Misses       3452     3456       +4     
- Partials      939      941       +2     

Impacted Files	Coverage Δ
internal/types/document_validation.go	100.00% <ø> (ø)
internal/util/version/version.go	70.58% <0.00%> (-4.42%)	⬇️
internal/handlers/common/filter.go	84.68% <0.00%> (-0.55%)	⬇️
internal/handlers/pg/pgdb/insert.go	69.38% <0.00%> (+6.12%)	⬆️

Flag	Coverage Δ
integration	64.02% <ø> (-0.05%)	⬇️
mongodb	14.00% <ø> (-0.03%)	⬇️
pg	52.90% <ø> (-0.05%)	⬇️
tigris	37.28% <ø> (-0.03%)	⬇️
unit	26.77% <ø> (-0.03%)	⬇️

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