Support Apache Kylin in EngineSpec

[zhaoyongjie]

No description provided.

[codecov-io]

Codecov Report

Merging #4925 into master will decrease coverage by 0.04%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master    #4925      +/-   ##
==========================================
- Coverage   77.12%   77.08%   -0.05%     
==========================================
  Files          44       44              
  Lines        8539     8549      +10     
==========================================
+ Hits         6586     6590       +4     
- Misses       1953     1959       +6

Impacted Files	Coverage Δ
superset/db_engine_specs.py	52.47% <80%> (-0.23%)	⬇️

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