php-in-php: ErrorRaise/TypeErrorRaise pending buffer via JIT helpers (#9778)

[PurHur]

Summary

• Route JIT/AOT catchable Error and TypeError pending state through new PHP SSOT helpers ext/standard/ErrorRaiseJitHelper.php and ext/standard/TypeErrorRaiseJitHelper.php instead of per-module LLVM globals (phpc_jit_error_pending_*, phpc_jit_type_error_pending_*).
• ErrorRaise.php / TypeErrorRaise.php now emit thin LLVM bridges (raise/has/clear/copy) that call compiled PHP helpers; bodies link at Context::compileInPlace() after user IR is lowered.
• Nested helper compile uses block-storage isolation (Refresh compiler_lib spine sidecar after native full-spine AOT compile (#2201) #8559), CallArgv init, and hashtable decls before compile (ObGzhandler pattern).

php-src ref: Zend/zend_exceptions.c — zend_throw_error, catchable Error/TypeError dispatch

LLVM removed: registerPendingGlobals / implementRaiseFunction / global memcpy pending buffers in both modules

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit --filter ErrorRaiseRuntimeShrinkTest'
# OK (4 tests, 22 assertions)

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && vendor/bin/phpunit --filter TypeErrorRaiseRuntimeShrinkTest'
# OK (2 tests, 13 assertions)

php script/check-selfhost-spine-coverage-sync.php
# check-selfhost-spine-coverage-sync: OK

make bootstrap-selfhost-vm-driver-execute-probe
# bootstrap-selfhost-vm-driver-execute-probe: OK

Closes #9778

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