AOT: Reflection getParameters() on runtime internal names + phpcredits true return

[PurHur]

Summary

• Embed full internal-function Reflection metadata when ReflectionFunction::getParameters() is linked, so AOT binaries compile and match Zend for foreach-over-function-name probes (array_diff/array_intersect family, Regression: array_diff/array_intersect* Reflection names arr1/arr2 — Zend array/arrays|rest (ext/standard/array.stub.php) #23593)
• Fix phpcredits Reflection return type label: Zend stub is literal true, not bool (Regression: phpcredits Reflection names flag — Zend flags; named flags rejected (ext/standard/info.stub.php) #24508)
• Align JIT variadic internal unknown-named-arg errors with VM ArgumentCountError (Stdlib: max()/min(...$stringKeyedArray) crashes — Zend ArgumentCountError (ext/standard/array.c, VmMinMax.php) #23449)

Verification

./script/aot-smoke.sh
# aot-smoke: 8 passed, 0 failed

./script/docker-exec.sh -- bash -lc 'php bin/compile.php -o /tmp/t.bin test/repro/maintainer_gap_array_diff_intersect_reflection_names.php && /tmp/t.bin'
# matches Zend byte-for-byte

./script/docker-exec.sh -- bash -lc 'php bin/compile.php -o /tmp/t.bin test/repro/maintainer_gap_phpcredits_flag.php && /tmp/t.bin'
# ret=true (not ret=bool)

./script/phpunit.sh --filter Issue23593ReflectionFunctionVariadicAotTest
# OK (4 tests, 11 assertions)

Not run: full differential sweep (139/139 was green on master before this change), release-readiness.sh, north-star5-verify.

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