fix(crypto): add legacy multisignature schema

[spkjp]

Summary

Because of #3008 the asset for legacy multisignatures is now actually stripped off, because it is missing from the schema. Before it errored out early enough to keep the asset intact, which is why it was never an issue.

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #3040 into develop will increase coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #3040      +/-   ##
===========================================
+ Coverage    65.63%   65.64%   +<.01%     
===========================================
  Files          425      425              
  Lines        11732    11732              
  Branches      1595     1595              
===========================================
+ Hits          7700     7701       +1     
  Misses        3995     3995              
+ Partials        37       36       -1

Impacted Files	Coverage Δ
packages/crypto/src/transactions/types/schemas.ts	100% <ø> (ø)	⬆️
packages/core-api/src/plugins/pagination/ext.ts	81.13% <0%> (+1.88%)	⬆️

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