chore: Improve Japanese translation

[bungoume]

SUMMARY

Improve Japanese translation.

• Updated the pot file as master (with fix: pybabel extract fails #14338).
• Added and fixed Japanese translation.

ADDITIONAL INFORMATION

• Has associated issue:
• 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

[etr2460]

Thanks for the contribution! a cursory glance with my hobbyist Japanese skills indicates this is good, but if anyone else from the community knows Japanese, a secondary review would be appreciated

[etr2460]

@bungoume could you run pre-commit locally to fix this CI check?

[codecov]

Codecov Report

Merging #14339 (3184c54) into master (3e8bf96) will decrease coverage by 0.27%.
The diff coverage is 44.44%.

❗ Current head 3184c54 differs from pull request most recent head 715d636. Consider uploading reports for the commit 715d636 to get more accurate results

@@            Coverage Diff             @@
##           master   #14339      +/-   ##
==========================================
- Coverage   77.17%   76.90%   -0.28%     
==========================================
  Files         954      954              
  Lines       48134    48141       +7     
  Branches     5985     5987       +2     
==========================================
- Hits        37149    37022     -127     
- Misses      10788    10922     +134     
  Partials      197      197              

Flag	Coverage Δ
hive	?
mysql	81.04% <36.84%> (-0.01%)	⬇️
postgres	81.07% <36.84%> (+0.01%)	⬆️
presto	?
python	81.15% <36.84%> (-0.46%)	⬇️
sqlite	80.68% <36.84%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset/config.py	91.12% <ø> (ø)
superset/db_engine_specs/base.py	87.68% <0.00%> (-0.44%)	⬇️
superset/security/manager.py	91.48% <ø> (ø)
superset/views/base_api.py	98.28% <ø> (ø)
superset/views/base_schemas.py	0.00% <0.00%> (ø)
superset/views/sql_lab.py	60.68% <0.00%> (ø)
superset/views/core.py	75.65% <14.28%> (-0.06%)	⬇️
superset/jinja_context.py	87.57% <33.33%> (ø)
...src/dashboard/components/FiltersBadge/selectors.ts	76.92% <50.00%> (-1.65%)	⬇️
superset/charts/api.py	81.81% <100.00%> (ø)
... and 14 more

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