Fix #491 - Allow the COLLATE keyword in WHERE clauses

[BackEndTea]

Fixes: #491

I've altered the query to not use ?, since that seems to have errors.

[codecov]

Codecov Report

Patch coverage: 94.41% and no project coverage change.

Comparison is base (4751563) 96.61% compared to head (7f0f054) 96.61%.
Report is 1 commits behind head on 5.8.x.

❗ Current head 7f0f054 differs from pull request most recent head 371377d. Consider uploading reports for the commit 371377d to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              5.8.x     #494   +/-   ##
=========================================
  Coverage     96.61%   96.61%           
  Complexity     2173     2173           
=========================================
  Files            66       66           
  Lines          5054     5054           
=========================================
  Hits           4883     4883           
  Misses          171      171           

Files Changed	Coverage Δ
src/Tools/CustomJsonSerializer.php	0.00% <0.00%> (ø)
src/Tools/TestGenerator.php	0.00% <0.00%> (ø)
src/Components/UnionKeyword.php	55.55% <20.00%> (ø)
src/Components/WithKeyword.php	76.47% <20.00%> (ø)
src/Components/FunctionCall.php	93.33% <33.33%> (ø)
src/Components/Array2d.php	95.23% <50.00%> (ø)
src/Tools/ContextGenerator.php	70.17% <70.00%> (ø)
src/Components/AlterOperation.php	98.67% <71.42%> (ø)
src/Core.php	87.50% <75.00%> (ø)
src/Components/JoinKeyword.php	96.96% <77.77%> (ø)
... and 54 more

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[williamdes]

Thank you !
I rebased it onto our QA branch and did some minor edit to your PR description

[BackEndTea]

Thanks @williamdes !