fix(MapQueryParameter): convert pcre regex to ecma

[xavierleune]

Description

Hello everyone,
The current QueryParameterDescriber may generate an invalid definition, as we should have only ECMA 262 patterns.
This pull request ensure a better compliance, converting regexp to ecma syntax. It also fixes tests for the MapQueryParameterController, as in #2423 the namespace was not imported, so fixtures were incorrect.

Thanks !

What type of PR is this? (check all applicable)

• Bug Fix
• Feature
• Refactor
• Deprecation
• Breaking Change
• Documentation Update
• CI

Checklist

• I have made corresponding changes to the documentation (docs/)
• I have made corresponding changes to the changelog (CHANGELOG.md)

[codecov]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.20%. Comparing base (8b4803f) to head (43f4ea1).

Files with missing lines	Patch %	Lines
...entDescriber/SymfonyMapQueryParameterDescriber.php	94.11%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2435      +/-   ##
==========================================
+ Coverage   90.18%   90.20%   +0.01%     
==========================================
  Files          94       94              
  Lines        3067     3083      +16     
==========================================
+ Hits         2766     2781      +15     
- Misses        301      302       +1     

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