feat(core-api): allow block display via height in v2 API

[faustbrian]

Proposed changes

Allows to display blocks via http://localhost:4003/api/v2/blocks/14367 based on a height to remove the need to know the block ID.

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

[codecov-io]

Codecov Report

Merging #1626 into develop will increase coverage by 0.12%.
The diff coverage is 50%.

@@             Coverage Diff             @@
##           develop    #1626      +/-   ##
===========================================
+ Coverage    74.75%   74.87%   +0.12%     
===========================================
  Files          439      439              
  Lines         7894     7896       +2     
  Branches      1038     1039       +1     
===========================================
+ Hits          5901     5912      +11     
+ Misses        1770     1764       -6     
+ Partials       223      220       -3

Impacted Files	Coverage Δ
packages/core-api/lib/repositories/blocks.js	88.09% <50%> (-1.91%)	⬇️
...p2p/lib/server/versions/internal/handlers/utils.js	86.66% <0%> (+6.66%)	⬆️
packages/core-forger/lib/manager.js	80.58% <0%> (+8.73%)	⬆️

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