chore: apply capitalization guidelines - iteration 4 (#12343)

[michael-s-molina]

SUMMARY

Apply capitalization guidelines defined in #12343.

@junlincc

TEST PLAN

Check if modified texts are following capitalization guidelines.

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[codecov-io]

Codecov Report

Merging #12450 (3bb35e0) into master (5504762) will decrease coverage by 1.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12450      +/-   ##
==========================================
- Coverage   64.55%   63.34%   -1.22%     
==========================================
  Files        1018      486     -532     
  Lines       49787    29983   -19804     
  Branches     4971        0    -4971     
==========================================
- Hits        32141    18992   -13149     
+ Misses      17468    10991    -6477     
+ Partials      178        0     -178     

Flag	Coverage Δ
cypress	?
javascript	?
python	63.34% <ø> (-0.79%)	⬇️

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

Impacted Files	Coverage Δ
superset/db_engines/hive.py	0.00% <0.00%> (-85.72%)	⬇️
superset/sql_validators/postgres.py	50.00% <0.00%> (-50.00%)	⬇️
superset/db_engine_specs/hive.py	54.61% <0.00%> (-29.24%)	⬇️
superset/databases/commands/create.py	83.67% <0.00%> (-8.17%)	⬇️
superset/databases/commands/update.py	85.71% <0.00%> (-8.17%)	⬇️
superset/connectors/sqla/models.py	84.31% <0.00%> (-6.28%)	⬇️
superset/db_engine_specs/sqlite.py	90.62% <0.00%> (-6.25%)	⬇️
superset/databases/commands/test_connection.py	84.78% <0.00%> (-4.35%)	⬇️
superset/utils/celery.py	96.42% <0.00%> (-3.58%)	⬇️
superset/models/core.py	85.59% <0.00%> (-3.27%)	⬇️
... and 533 more

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[adam-stasiak]

looks good to me

[mihir174]

LGTM! 👍