[ci] make CI tsconfig settings match the default local tsconfig settings

[szdziedzic]

Why

https://exponent-internal.slack.com/archives/C017N0N99RA/p1704412458848089?thread_ts=1686787194.341989&cid=C017N0N99RA

How

Make the default tsconfig used for the yarn start/yarn build command match the CI one (more strict). Add additional config that allows for unused params and locals. Add the yarn start-allow-unused command to utilize this config.

Test Plan

Run yarn start and yarn start-allow-unused commands locally

[github-actions]

Size Change: -1.98 kB (0%)

Total Size: 55.5 MB

Filename	Size	Change
./packages/eas-cli/dist/eas-linux-x64.tar.gz	55.5 MB	-1.98 kB (0%)

_{compressed-size-action}

[github-actions]

⏩ The changelog entry check has been skipped since the "no changelog" label is present.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eeb143a) 54.21% compared to head (e431407) 54.21%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2167   +/-   ##
=======================================
  Coverage   54.21%   54.21%           
=======================================
  Files         509      509           
  Lines       18670    18670           
  Branches     3741     3741           
=======================================
  Hits        10121    10121           
  Misses       8528     8528           
  Partials       21       21           

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[wschurman]

Awesome!