feat: support Struct as a Launch input type

[schottra]

TL;DR

This adds support for our Struct input type, which is essentially just a Protobuf.Struct object. Users will enter this value as a JSON object string, which will then be parsed and converted to a Protobuf.Struct object using the appropriate types for resulting values.

Type

• Bug Fix
• Feature
• Plugin

Are all requirements met?

• Code completed
• Smoke tested
• Unit tests added
• Code documentation added
• Any pending items have an associated Issue

Complete description

• Added inputHelper code for converting between a JSON object string and a Struct Literal.
• Updated code for type support to allow Structs.
• Added a component for entering a Struct value, which is similar to a Collection in that it is a multi-line string input.
• Added test cases, which involved some refactoring of the unit tests to correctly format the input values and expected outputs.
• Added a simple wrapper for JSON.stringify to ensure consistent formatting (2 spaces) and updated relevant code to use that instead of JSON.stringify directly

Tracking Issue

flyteorg/flyte#22

Follow-up issue

NA

[codecov-io]

Codecov Report

Merging #113 into master will increase coverage by 0.21%.
The diff coverage is 83.89%.

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
+ Coverage   70.37%   70.59%   +0.21%     
==========================================
  Files         384      387       +3     
  Lines        6404     6516     +112     
  Branches     1017     1044      +27     
==========================================
+ Hits         4507     4600      +93     
- Misses       1897     1916      +19     

Impacted Files	Coverage Δ
...omponents/Launch/LaunchForm/inputHelpers/struct.ts	77.77% <77.77%> (ø)
src/components/Launch/LaunchForm/StructInput.tsx	91.66% <91.66%> (ø)
src/common/utils.ts	90.74% <100.00%> (+0.35%)	⬆️
.../components/Launch/LaunchForm/LaunchFormInputs.tsx	85.36% <100.00%> (+1.15%)	⬆️
...onents/Launch/LaunchForm/inputHelpers/constants.ts	100.00% <100.00%> (ø)
...aunch/LaunchForm/inputHelpers/getHelperForInput.ts	100.00% <100.00%> (ø)
...ch/LaunchForm/inputHelpers/test/structTestCases.ts	100.00% <100.00%> (ø)
...s/Launch/LaunchForm/inputHelpers/test/testCases.ts	100.00% <100.00%> (ø)
...components/Launch/LaunchForm/inputHelpers/utils.ts	86.66% <100.00%> (+0.30%)	⬆️
src/components/common/DumpJSON.tsx	66.66% <100.00%> (+6.66%)	⬆️
... and 3 more

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[service-github-lyft-semantic-release]

🎉 This PR is included in version 0.17.0 🎉

The release is available on GitHub release

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