Replace bson with bson2 in wire

[AlekSi]

Description

Only bson2 tests still use old bson package.

Readiness checklist

• I added/updated unit tests (and they pass).
• I added/updated integration/compatibility tests (and they pass).
• I added/updated comments and checked rendering.
• I made spot refactorings.
• I updated user documentation.
• I ran task all, and it passed.
• I ensured that PR title is good enough for the changelog.
• (for maintainers only) I set Reviewers (@FerretDB/core), Milestone (Next), Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[codecov]

Codecov Report

Attention: Patch coverage is 67.54386% with 37 lines in your changes are missing coverage. Please review.

Project coverage is 74.25%. Comparing base (910c351) to head (1aaca4f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4110      +/-   ##
==========================================
- Coverage   74.62%   74.25%   -0.37%     
==========================================
  Files         352      352              
  Lines       22579    22579              
==========================================
- Hits        16849    16767      -82     
- Misses       4436     4553     +117     
+ Partials     1294     1259      -35     

Files	Coverage Δ
internal/bson2/bson2.go	84.37% <100.00%> (+0.24%)	⬆️
internal/bson2/decode.go	93.84% <ø> (+2.80%)	⬆️
internal/bson2/document.go	51.47% <ø> (+0.76%)	⬆️
internal/bson2/encode.go	58.53% <ø> (+1.39%)	⬆️
internal/bson2/raw_document.go	83.56% <100.00%> (ø)
internal/handler/handlererrors/error.go	84.61% <ø> (ø)
internal/wire/msg_body.go	50.00% <ø> (+2.43%)	⬆️
internal/wire/op_query.go	49.38% <33.33%> (+2.46%)	⬆️
internal/wire/op_reply.go	53.22% <60.00%> (+3.22%)	⬆️
internal/wire/op_msg.go	69.84% <69.47%> (+9.51%)	⬆️

... and 20 files with indirect coverage changes

Flag	Coverage Δ
filter-true	67.65% <48.24%> (+0.43%)	⬆️
hana-1	?
integration	67.65% <48.24%> (+0.43%)	⬆️
mongodb-1	4.76% <0.00%> (+0.12%)	⬆️
postgresql-1	48.47% <47.36%> (+0.65%)	⬆️
postgresql-2	48.84% <47.36%> (+0.44%)	⬆️
postgresql-3	49.34% <48.24%> (+0.53%)	⬆️
sqlite-1	47.61% <47.36%> (+0.52%)	⬆️
sqlite-2	48.03% <47.36%> (+0.47%)	⬆️
sqlite-3	48.48% <48.24%> (+0.57%)	⬆️
unit	32.76% <65.78%> (+0.13%)	⬆️

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

[AlekSi]

Don't miss that one

[noisersup]

Some tests related to NaN need to be adjusted, otherwise looks good to me

[AlekSi]

There is no need to merge main and waste CI cycles: tests should be fixed first