test(aot): fix 404 Status expectation and add REQUEST_METHOD PHPT

[PurHur]

Summary

• Align in_array_router_404.phpt with actual AOT http_response_code(404) output (Status: 404, matching http_response_code.phpt).
• Add web_request_method.phpt to assert $_SERVER['REQUEST_METHOD'] after __superglobals__refresh at runtime.

Docker test output (php-compiler:22.04-dev)

php vendor/bin/phpunit --group aot-link --exclude-group serve

• 124 tests, 677 assertions
• Failures (pre-existing): 1 — coalesce_get_present.phpt ($_GET['name'] ?? 'Guest' prints empty; compile succeeds, run returns blank line)

Repro (coalesce — follow-up)

export PHP_COMPILER_LLVM_PATH=$PWD/.llvm LD_LIBRARY_PATH=$PWD/.llvm PATH=$PWD/.llvm:$PATH
code='<?php $n = $_GET["name"] ?? "Guest"; echo $n, "\n";'
echo "$code" | php bin/compile.php -q name=Ada -o /tmp/coalesce_bin -
QUERY_STRING=name=Ada /tmp/coalesce_bin   # expected: Ada, actual: (empty)

Test plan

• ./script/docker-ci-local.sh --group aot-link --exclude-group serve (bind-mount via tar)
• Full ./script/ci-local.sh before merge (blocked on coalesce fix unless we accept known failure)

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