Fix/storage emulator json stream

[benjaminpetersen]

Description

Sometimes the storage emulator fails to resolve and the network request remains in a pending state.
The problem comes from the java subprocess. When a received chunk includes a non-json log or 2 json objects the parse command fails, logs, and returns.
The fix I implemented is finding matching brackets and parsing the content in those.

Linked issue: #6194

Scenarios Tested

[FIXED]: When users add debug(...) to storage.rules files, the requests intermittently hang.
[FIXED]: When hundreds of requests go out sometimes response get tangled.

Sample Commands

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[benjaminpetersen]

It seems I can't agree to the CLA

[abhis3]

Thanks for the fix!! 🚀

[codecov-commenter]

Codecov Report

Attention: 38 lines in your changes are missing coverage. Please review.

Comparison is base (a6f052e) 54.28% compared to head (73b3c50) 54.23%.
Report is 17 commits behind head on master.

Files	Patch %	Lines
src/emulator/jsonUtils.ts	18.42%	31 Missing ⚠️
src/emulator/storage/rules/runtime.ts	12.50%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6615      +/-   ##
==========================================
- Coverage   54.28%   54.23%   -0.06%     
==========================================
  Files         347      348       +1     
  Lines       24077    24116      +39     
  Branches     4971     4986      +15     
==========================================
+ Hits        13071    13079       +8     
- Misses       9806     9837      +31     
  Partials     1200     1200              

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[christhompsongoogle]

Thank you Benjamin, would you be willing to add some test coverage for this case?