fix(engine): update databend engine spec for dialect version >=0.4.6

[rad-pat]

SUMMARY

The Databend driver changed for later dialect versions and this requires different params on the connection string. This PR includes the latest revision of the databend dialect which itself contained a number of fixes and now includes validation via SQLAlchemy testing suite.

TESTING INSTRUCTIONS

Validate by testing against a Databend instance

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

[rad-pat]

@hantmac - as discussed, here is PR for updating superset with latest dialect.

[john-bodley]

@hantmac it seems like you maybe added the the Databend engine spec and thus I was wondering whether you would mind reviewing the PR?

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 22.22222% with 7 lines in your changes missing coverage. Please review.

Project coverage is 83.00%. Comparing base (76d897e) to head (7027143). Report is 1468 commits behind head on master.

Files with missing lines	Patch %	Lines
superset/db_engine_specs/databend.py	22.22%	7 Missing :warning:

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #28627       +/-   ##
===========================================
+ Coverage   60.48%   83.00%   +22.51%     
===========================================
  Files        1931      539     -1392     
  Lines       76236    39071    -37165     
  Branches     8568        0     -8568     
===========================================
- Hits        46114    32430    -13684     
+ Misses      28017     6641    -21376     
+ Partials     2105        0     -2105     

Flag	Coverage Δ
hive	48.83% <22.22%> (-0.33%)	:arrow_down:
javascript	?
mysql	75.60% <22.22%> (?)
postgres	75.66% <22.22%> (?)
presto	53.35% <22.22%> (-0.45%)	:arrow_down:
python	83.00% <22.22%> (+19.51%)	:arrow_up:
sqlite	75.13% <22.22%> (?)
unit	61.04% <22.22%> (+3.42%)	:arrow_up:

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[hantmac]

@hantmac it seems like you maybe added the the Databend engine spec and thus I was wondering whether you would mind reviewing the PR?

Sorry for late response. I will review as soon as possible. Thanks!

[rad-pat]

@betodealmeida , any chance of this progressing? Do you want me to rebase against master?

[rusackas]

/korbit-review