refactor(DB Connections): Build Snowflake Dynamic Form

[AAfghahi]

SUMMARY

This moves all fields that are not in BasicParametersSchema into their own file in order to make DB Connections Form smaller. The reason for doing this because we are going to be parsing Snowflake's sql alchemy uri in order to enable it for the dynamic form.

This PR also builds up build_sql_alchemy_uri, and get_parameters_from_uri in the Snowflake engine spec.

Lastly, as part of a larger refactor of the DB connection form, I created a validatedInputField that is a sort of go to for any basic string fields that we may want to add to the DB Connection Form.

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]

Codecov Report

Merging #16875 (a37bb06) into pexdax/snowflake (9fa95ba) will decrease coverage by 0.03%.
The diff coverage is 54.54%.

❗ Current head a37bb06 differs from pull request most recent head 3e7d795. Consider uploading reports for the commit 3e7d795 to get more accurate results

@@                 Coverage Diff                  @@
##           pexdax/snowflake   #16875      +/-   ##
====================================================
- Coverage             76.82%   76.78%   -0.04%     
====================================================
  Files                  1021     1022       +1     
  Lines                 54903    54899       -4     
  Branches               7487     7488       +1     
====================================================
- Hits                  42179    42154      -25     
- Misses                12477    12498      +21     
  Partials                247      247              

Flag	Coverage Δ
hive	?
javascript	71.13% <57.14%> (+<0.01%)	⬆️
presto	?

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

Impacted Files	Coverage Δ
superset/db_engine_specs/snowflake.py	80.37% <33.33%> (+5.16%)	⬆️
...s/CRUD/data/database/DatabaseModal/ExtraFields.tsx	50.00% <50.00%> (ø)
.../database/DatabaseModal/DatabaseConnectionForm.tsx	49.15% <100.00%> (+1.53%)	⬆️
superset/datasets/dao.py	96.50% <100.00%> (ø)
superset/models/core.py	89.26% <100.00%> (+2.43%)	⬆️
superset/db_engines/hive.py	0.00% <0.00%> (-85.19%)	⬇️
superset/db_engine_specs/hive.py	69.76% <0.00%> (-17.06%)	⬇️
superset/db_engine_specs/presto.py	83.47% <0.00%> (-6.91%)	⬇️
superset/views/database/mixins.py	81.03% <0.00%> (-1.73%)	⬇️
superset/connectors/sqla/models.py	85.59% <0.00%> (-1.66%)	⬇️
... and 15 more

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[hughhhh]

lets split these out into individual files

[hughhhh]

looks good just clean up the import

[hughhhh]

Rename /DatabaseConnectionForm/DatabaseConnectionForm to /DatabaseConnectionForm/index.tsx so we can just import like this:

import DatabaseConnectionForm from './DatabaseConnectionForm/DatabaseConnectionForm';