Enter the test-case context before checking a test's requirements

[lazerg]

This fixes a regression introduced in 13.2.0.

When a deprecation is triggered while PHPUnit evaluates a test's requirements — for example, a #[RequiresMethod] attribute whose method_exists() check autoloads a class that triggers a deprecation as a side effect of being loaded — the deprecation is reported as having been "triggered outside of tests". As a result it cannot be silenced with #[IgnoreDeprecations], it is not written to a generated baseline, and it makes the suite fail under --fail-on-deprecation. The same code did not report this deprecation in 13.1.

The cause is in TestBuilder::build(): requirementsSatisfied() (which performs the requirement checks, and therefore the autoloading) is called before ErrorHandler::enterTestCaseContext(). Since 13.2 has an error handler active for the non-test-case context during test building, a deprecation triggered there is emitted immediately as "outside of tests" instead of being deferred to the test it belongs to.

This moves the enterTestCaseContext()/leaveTestCaseContext() window so it also covers requirementsSatisfied() and filterExcludesMethod(). The deprecation is then deferred and replayed in the context of the test — exactly as already happens for deprecations triggered in data providers — so it is attributed to the test, honours #[IgnoreDeprecations], and is written to the baseline.

A regression test (tests/end-to-end/regression/6778) is included; it fails before this change ("triggered outside of tests") and passes after. The full end-to-end test suite remains green.

Closes #6778

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.66%. Comparing base (7fc6d2b) to head (d415ecd).
⚠️ Report is 2 commits behind head on 13.2.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               13.2    #6779   +/-   ##
=========================================
  Coverage     97.66%   97.66%           
  Complexity     8696     8696           
=========================================
  Files           868      868           
  Lines         26554    26554           
=========================================
  Hits          25933    25933           
  Misses          621      621           

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