feat: Enabling source maps full time

[rusackas]

SUMMARY

Since a lot of folks are debugging on prod builds, source maps would sure be helpful! Also, they don't get loaded by browsers unless the dev tools are open, so there should be no real performance hit. This PR turns on source maps for styles and JS.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Build an ephemeral environment and attempt to debug styles/JS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #19710 (488ac2a) into master (32a9265) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #19710   +/-   ##
=======================================
  Coverage   66.50%   66.50%           
=======================================
  Files        1684     1684           
  Lines       64570    64570           
  Branches     6630     6630           
=======================================
  Hits        42941    42941           
  Misses      19931    19931           
  Partials     1698     1698           

Flag	Coverage Δ
hive	52.69% <ø> (ø)
javascript	51.14% <ø> (ø)
mysql	81.94% <ø> (ø)
postgres	81.99% <ø> (ø)
presto	52.54% <ø> (ø)
python	82.43% <ø> (ø)
sqlite	81.76% <ø> (ø)
unit	47.75% <ø> (ø)

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