feat(translations): cleaning and adding scripts for translations - working toward automation

[rusackas]

SUMMARY

Ok, so we're working toward solidifying/stabilizing translation efforts. Here's another step in the chain, where we:

• Remove .json translation files from the repo and add them to .gitignore
• Tweak the .json building script so it can be run from a new npm run build-translations script
• Build those translations whenever doing npm run build or build-instrumented
• Remove translation code owners - they shouldn't be needed now that people won't likely edit the .json files.
• Removes two npm scripts for linting translations. From here on out, you just get what you get, and it'll work :)
• Removing translation lint check on CI, as that's no longer relevant.

Next steps/PRs:

• add a CI task that updates the .pot file and .po files on any PR that touches .py or .(j|t)s(x) files.
• build the translation files on docker builds

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 59.57%. Comparing base (a912faf) to head (2acbc8e). Report is 52 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27107      +/-   ##
==========================================
- Coverage   67.17%   59.57%   -7.61%     
==========================================
  Files        1900     1900              
  Lines       74430    74430              
  Branches     8293     8293              
==========================================
- Hits        50001    44343    -5658     
- Misses      22374    28032    +5658     
  Partials     2055     2055              

Flag	Coverage Δ
hive	53.80% <ø> (?)
javascript	56.86% <ø> (ø)
mysql	?
postgres	?
presto	53.75% <ø> (?)
python	62.48% <ø> (-15.78%)	:arrow_down:
sqlite	?
unit	56.42% <ø> (?)

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[rusackas]

Wow... of all things, the DB tests are failing spectacularly. Not sure what to make of this yet.

[michael-s-molina]

We should probably also update the translation section in CONTRIBUTING.md.

[mistercrunch]

I think everything here is superseeded by https://github.com/apache/superset/pull/28483