feat: add connector for CrateDB

[srinify]

SUMMARY

Add support for CrateDB: https://crate.io/

TEST PLAN

Manual testing + new tests

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 #13152 (6cad236) into master (2ce7982) will increase coverage by 18.27%.
The diff coverage is 29.71%.

@@             Coverage Diff             @@
##           master   #13152       +/-   ##
===========================================
+ Coverage   53.06%   71.33%   +18.27%     
===========================================
  Files         489      824      +335     
  Lines       17314    41123    +23809     
  Branches     4482     4260      -222     
===========================================
+ Hits         9187    29335    +20148     
- Misses       8127    11788     +3661     

Flag	Coverage Δ
cypress	57.19% <29.71%> (+4.13%)	⬆️
hive	80.14% <ø> (?)
postgres	80.50% <ø> (?)
python	80.82% <ø> (?)

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

Impacted Files	Coverage Δ
.../src/SqlLab/components/EstimateQueryCostButton.jsx	20.83% <ø> (ø)
...end/src/SqlLab/components/ExploreResultsButton.jsx	8.00% <ø> (ø)
...et-frontend/src/SqlLab/components/QueryHistory.jsx	50.00% <0.00%> (ø)
...end/src/SqlLab/components/RunQueryActionButton.tsx	52.77% <ø> (ø)
...erset-frontend/src/SqlLab/components/SouthPane.jsx	64.10% <ø> (ø)
...et-frontend/src/SqlLab/components/TableElement.jsx	5.88% <0.00%> (+0.20%)	⬆️
...end/src/SqlLab/components/TemplateParamsEditor.jsx	23.80% <ø> (ø)
...et-frontend/src/SqlLab/reducers/getInitialState.js	50.00% <ø> (ø)
superset-frontend/src/SqlLab/reducers/sqlLab.js	17.47% <0.00%> (-0.15%)	⬇️
...src/SqlLab/utils/reduxStateToLocalStorageHelper.js	61.53% <ø> (ø)
... and 657 more

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[dpgaspar]

Nice, one more engine!