feat(query-generator): add startsWith, endsWith and substring (#9935)

[ferfabricio]

Pull Request check-list

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• Does npm run test or npm run test-DIALECT pass with this change (including linting)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• Have you added new tests to prevent regressions?
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Description of change

Implements startsWith, endsWith and substring query operatos like in django ORM like described in the issue.

Closes #9935

[ferfabricio]

I think this test is instable. I run many times on a docker and get different results on executions.

[codecov]

Codecov Report

Merging #9999 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #9999      +/-   ##
==========================================
+ Coverage   96.39%   96.39%   +<.01%     
==========================================
  Files          63       63              
  Lines        9400     9406       +6     
==========================================
+ Hits         9061     9067       +6     
  Misses        339      339

Impacted Files	Coverage Δ
lib/operators.js	100% <ø> (ø)	⬆️
lib/dialects/abstract/query-generator/operators.js	90.9% <ø> (ø)	⬆️
lib/dialects/abstract/query-generator.js	97.65% <100%> (+0.01%)	⬆️

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[sushantdhiman]

I think this test is instable. I run many times on a docker and get different results on executions.

I'll look into this

[sushantdhiman]

Thanks @ferfabricio

[abettke]

Legend. Thanks for the PR @ferfabricio

[gabegorelick]

It seems like startsWith and endsWith are reversed from what they should be, or am I missing something?

See #10743

[madmoizo]

And based on javascript String, includes would have been more relevant than substring