feat(core): add support for case insensitive LIKE operator

[villebro]

🏆 Enhancements

Adds support for the ILIKE binary operator: https://docs.sqlalchemy.org/en/13/core/sqlelement.html#sqlalchemy.sql.operators.ColumnOperators.ilike

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[kgabryje]

Lgtm

[codecov]

Codecov Report

Merging #1129 (07ba589) into master (3c24a78) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1129   +/-   ##
=======================================
  Coverage   29.04%   29.04%           
=======================================
  Files         462      462           
  Lines        9225     9225           
  Branches     1457     1457           
=======================================
  Hits         2679     2679           
  Misses       6341     6341           
  Partials      205      205           

Impacted Files	Coverage Δ
...kages/superset-ui-core/src/query/types/Operator.ts	100.00% <100.00%> (ø)

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