feat: invalid hostname and password error messages (Redshift)

[AAfghahi]

SUMMARY

Capture the most common error messages in Redshift, and return them to the user. This is used when first making a DB.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

Added Unit tests

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

[betodealmeida]

Awesome!

[AAfghahi]

🏷️ ready-to-merge

[betodealmeida]

🏷️ #ready-to-merge

[codecov]

Codecov Report

Merging #14111 (fb8d02a) into master (cfe927b) will decrease coverage by 0.16%.
The diff coverage is 100.00%.

❗ Current head fb8d02a differs from pull request most recent head 60f24fc. Consider uploading reports for the commit 60f24fc to get more accurate results

@@            Coverage Diff             @@
##           master   #14111      +/-   ##
==========================================
- Coverage   79.55%   79.38%   -0.17%     
==========================================
  Files         944      944              
  Lines       47871    47852      -19     
  Branches     6045     6045              
==========================================
- Hits        38082    37987      -95     
- Misses       9668     9744      +76     
  Partials      121      121              

Flag	Coverage Δ
cypress	56.40% <ø> (+0.02%)	⬆️
hive	?
mysql	80.75% <100.00%> (+<0.01%)	⬆️
postgres	80.76% <100.00%> (?)
python	80.81% <100.00%> (-0.33%)	⬇️
sqlite	?

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

Impacted Files	Coverage Δ
superset/db_engine_specs/redshift.py	93.75% <100.00%> (+6.25%)	⬆️
superset/db_engines/hive.py	0.00% <0.00%> (-82.15%)	⬇️
superset/db_engine_specs/hive.py	74.42% <0.00%> (-16.42%)	⬇️
superset/db_engine_specs/sqlite.py	90.62% <0.00%> (-6.25%)	⬇️
superset/utils/celery.py	86.20% <0.00%> (-3.45%)	⬇️
superset/models/dashboard.py	71.85% <0.00%> (-2.57%)	⬇️
superset/db_engine_specs/presto.py	81.79% <0.00%> (-2.31%)	⬇️
superset/views/database/mixins.py	81.03% <0.00%> (-1.73%)	⬇️
superset/result_set.py	96.77% <0.00%> (-1.62%)	⬇️
superset/db_engine_specs/base.py	86.54% <0.00%> (-0.90%)	⬇️
... and 12 more

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[eschutho]

🏷 ready-to-merge

[betodealmeida]

🏷 ready-to-merge

What magic is this?!?

[AAfghahi]

🏷 ready-to-merge

What magic is this?!?

I made this helpful graphic about what happened: