Testing: re-enable AOT differential print_r/var_dump array cases (#23540)

[PurHur]

Summary

• Remove stale @differential-skip-aot from g02_print_r.php and e29_var_dump_indent.php.
• Both cases now match Zend under thin standalone AOT (fixed by AOT: var_dump() aborts (SIGABRT) with no diagnostic — even var_dump(7) #23540 / php-in-php: JIT StringPrintRJit — route print_r() through VmVar PHP not __compiler_print_r LLVM (#1492) #9190 VarDumpJitHelper + php-in-PHP print_r path).

Context

Priority queue (#32122, #31968 children) is closed on master. This restores two cases that were incorrectly skipped, raising AOT differential coverage 121/121 → 123/123.

Verification

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

./script/differential-sweep.sh --aot
# 123/123 match Zend (aot backend)

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/differential/cases/g02_print_r.php; php bin/compile.php -o /tmp/t.bin test/differential/cases/g02_print_r.php && /tmp/t.bin'
# nested print_r output matches VM

./script/docker-exec.sh -- bash -lc 'php bin/vm.php test/differential/cases/e29_var_dump_indent.php; php bin/compile.php -o /tmp/t.bin test/differential/cases/e29_var_dump_indent.php && /tmp/t.bin'
# nested var_dump indent matches VM

Not covered

• Full ./script/ci-local.sh (LLVM compile gate)
• north-star5-verify --strict
• Compliance suite shard diff

Relates to closed #23540, #9190.

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