feat: make lossy buffers dynamically striped

[maypok86]

Description

I ported lossy buffers from caffeine and tried to cover them with tests as much as possible.

Advantages:

• Memory consumption is minimized for caches that are not heavily contended on.
• The hit rate has been slightly increased.

Disadvantages:

• Much more complex code :)

Related issue(s)

#74

✅ Checklist for your Pull Request

Related changes (conditional)

• Tests

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from
    silently reappearing again.

• Documentation

  • I checked whether I should update the docs and did so if necessary:
    • README

• Public contracts

  • My changes doesn't break project license.

Stylistic guide (mandatory)

• My code complies with the styles guide.

• My commit history is clean (only contains changes relating to my
  issue/pull request and no reverted-my-earlier-commit changes) and commit
  messages start with identifiers of related issues in square brackets.

  Example: [#42] Short commit description

  If necessary both of these can be achieved even after the commits have been
  made/pushed using rebase and squash.

Before merging (mandatory)

• Check target branch of PR is set correctly

[maypok86]

There are quite a few minor linter edits due to the golangci-lint update, but I'm too tired to try to separate them.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.07042% with 7 lines in your changes missing coverage. Please review.

Project coverage is 94.15%. Comparing base (0e7b832) to head (6553764).
Report is 46 commits behind head on v2.

Files with missing lines	Patch %	Lines
internal/lossy/striped.go	93.61%	3 Missing and 3 partials ⚠️
internal/eviction/disabled.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v2     #106      +/-   ##
==========================================
- Coverage   94.27%   94.15%   -0.12%     
==========================================
  Files          29       30       +1     
  Lines        1345     1421      +76     
==========================================
+ Hits         1268     1338      +70     
- Misses         55       58       +3     
- Partials       22       25       +3     

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