Trust: link StringTriggerError before Type::register NestedJIT (#33248)

[PurHur]

Summary

• After php-in-php: drop leftover Type always-on __compiler_trigger_error ABI shell (Zend/zend_execute_API.c) #33234 dropped Type's always-on __compiler_trigger_error shell, PHP_COMPILER_HELPER_RUNTIME_O=0 thin AOT failed during Type::register → SessionStartOptionsRuntime::ensureLinked NestedJIT (JitScalarEnumCoerce::emitObjectScalarWarning lookup).
• Call StringTriggerError::ensureLinked immediately before that NestedJIT; keep initialize ensureLinked and forbid restoring Type empty decls.
• Guards: shrink-test register order + HELPER_O=0 hello/DOM AOT unit tests.

Closes #33248

php-src

• Zend/zend_execute_API.c / main/php_errors.c — trigger_error / user error path (ABI ownership unchanged; link order only)

Test plan

• PHP_COMPILER_HELPER_RUNTIME_O=0 php bin/compile.php hello → prints hi
• Same for DOM createElement/setAttribute → prints 1
• ./script/phpunit.sh --filter 'TypeDeadTriggerErrorAbiRuntimeShrinkTest|TriggerErrorHelperRuntimeO033248AotTest' → OK (8 tests)
• ./script/aot-smoke.sh → 8/8
• Not covered: full ci-local.sh / north-star5-verify --strict

Verify transcript

HELPER_O=0 hello → hi
HELPER_O=0 DOM setattr → 1
phpunit filter → OK (8 tests, 35 assertions)
aot-smoke: 8 passed, 0 failed

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