feat(core-api): return wallet vote on v2 endpoints

[alexbarnsley]

Proposed changes

This helps reduce load on client applications when dealing with many wallets (E.g. the desktop and mobile wallets).

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works

[codecov-io]

Codecov Report

Merging #2009 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop   #2009   +/-   ##
=======================================
  Coverage     71.2%   71.2%           
=======================================
  Files          386     386           
  Lines         8329    8329           
  Branches      1211    1211           
=======================================
  Hits          5931    5931           
  Misses        2364    2364           
  Partials        34      34

Impacted Files	Coverage Δ
...ges/core-api/src/versions/2/wallets/transformer.ts	100% <ø> (ø)	⬆️

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