fix(CI): remove duplicate hive and presto tests

[ktmud]

SUMMARY

Just realized we've had duplicate CI workflows for Presto and Hive for a couple of months.

The unfortunate series of events happened as follows:

1. I split Presto and Hive into their own workflows in September: build: split hive and presto tests to separate jobs #10821
2. They were added back to superset-frontend.yml in docs(new docs site): removes old sphinx doc site with gatsby #10784 , probably by an improper handling of merge conflicts
3. @etr2460 split them again in November: build: split python CI jobs #11794 --- by that time I already forgot I already did the split just two months ago.... 🤦
4. I combined them into one workflow in build: try to speed up Github workflows #12090 , in hope to reduce jobs in queue.

This PR cleans up the Presto and Hive tests' standalone workflow files but keep the combined one superset-frontend-hive-presto.yml.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A

TEST PLAN

CI should pass

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 #12638 (139c27c) into master (7577f47) will decrease coverage by 3.61%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12638      +/-   ##
==========================================
- Coverage   66.80%   63.19%   -3.62%     
==========================================
  Files        1017      486     -531     
  Lines       49730    29982   -19748     
  Branches     4864        0    -4864     
==========================================
- Hits        33224    18948   -14276     
+ Misses      16383    11034    -5349     
+ Partials      123        0     -123     

Flag	Coverage Δ
cypress	?
javascript	?
python	63.19% <ø> (-0.80%)	⬇️

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/db_engine_specs/sqlite.py	65.62% <0.00%> (-9.38%)	⬇️
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/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 541 more

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