Migrate neo-swaps pools to bounded storage

[maltekliemann]

What does it do?

Migrates neo-swaps pools from BTreeMap to BoundedBTreeMap to avoid potentially faulty manual MaxEncodedLen implementations. Fixes #1214.

What important points should reviewers know?

Is there something left for follow-up PRs?

What alternative implementations were considered?

Are there relevant PRs or issues?

References

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 94.20290% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 91.89%. Comparing base (d3017c1) to head (fee8921).

Files	Patch %	Lines
zrml/neo-swaps/src/lib.rs	76.19%	5 Missing :warning:
zrml/neo-swaps/src/migration.rs	97.27%	3 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1253      +/-   ##
==========================================
+ Coverage   91.82%   91.89%   +0.07%     
==========================================
  Files         190      191       +1     
  Lines       34682    34793     +111     
==========================================
+ Hits        31847    31974     +127     
+ Misses       2835     2819      -16     

Flag	Coverage Δ
tests	91.89% <94.20%> (+0.07%)	:arrow_up:

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[mergify[bot]]

This pull request is now in conflicts. Could you fix it @maltekliemann? 🙏