Fix behat coverage not generated

[yoanm]

Pin behat/behat below 3.16.1
Starting at v3.17.0, no coverage file is generated due to XDebug driver badly managed:

No code coverage driver is available. No code coverage driver available

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 1dd13f61	✅ ∅ (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (1dd13f6)	Report Missing	Report Missing	Report Missing
Head commit (c65dbaf)	340	340	100.00%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#147)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (1dd13f6) to head (c65dbaf).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #147   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       169       169           
===========================================
  Files             28        28           
  Lines            450       450           
===========================================
  Hits             450       450           

Flag	Coverage Δ
functional-tests	99.55% <ø> (ø)
php-8.0	100.00% <ø> (ø)
php-8.2	100.00% <ø> (ø)
unit-tests	18.88% <ø> (ø)

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