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
✅ +0.00% (target: -0.10%)	✅ ∅ (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (0bf3fb2)	183	183	100.00%
Head commit (8ca45b0)	183 (+0)	183 (+0)	100.00% (+0.00%)

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 (#103)	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%

See your quality gate settings    Change summary preferences

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (0bf3fb2) to head (0f0de9d).

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #103   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
===========================================
  Files              7         7           
  Lines            210       210           
===========================================
  Hits             210       210           

Flag	Coverage Δ
functional-tests	100.00% <ø> (ø)
php-8.2	100.00% <ø> (ø)
sf-4.4	99.46% <ø> (ø)
sf-5.4	?
sf-6.0	100.00% <ø> (ø)
unit-tests	0.00% <ø> (ø)

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