Implement Collection.Compact for SQLite

[Akhil-2001]

Description

Closes #3469.

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

Merging #3536 (277965e) into main (57e283c) will decrease coverage by 1.90%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #3536      +/-   ##
==========================================
- Coverage   74.85%   72.95%   -1.90%     
==========================================
  Files         426      426              
  Lines       27162    27184      +22     
==========================================
- Hits        20331    19832     -499     
- Misses       5624     6111     +487     
- Partials     1207     1241      +34     

Files	Coverage Δ
internal/backends/sqlite/collection.go	72.09% <0.00%> (-6.77%)	⬇️

... and 35 files with indirect coverage changes

Flag	Coverage Δ
filter-true	69.76% <0.00%> (-1.88%)	⬇️
hana-1	?
integration	69.76% <0.00%> (-1.88%)	⬇️
mongodb-1	4.51% <0.00%> (-0.01%)	⬇️
pg-1	42.64% <0.00%> (-0.04%)	⬇️
pg-2	40.08% <0.00%> (-0.04%)	⬇️
pg-3	?
postgresql-1	41.42% <0.00%> (-0.04%)	⬇️
postgresql-2	38.86% <0.00%> (-0.03%)	⬇️
postgresql-3	41.25% <0.00%> (-0.09%)	⬇️
sort-false	69.76% <0.00%> (-1.88%)	⬇️
sqlite-1	41.86% <0.00%> (-0.04%)	⬇️
sqlite-2	39.10% <0.00%> (-0.07%)	⬇️
sqlite-3	?
unit	22.30% <0.00%> (-0.08%)	⬇️

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[noisersup]

Thank you for the contribution! Looks good to me.