fix(constants): expose deprecated module alias

[andrewtdiz]

Summary

• add constants as a supported native module with flat fs/os/crypto constant exports Perry already supports under module-specific *.constants namespaces
• route node:constants property reads through the existing fs/os/crypto constants tables and enumerate the supported flat keys
• cache the constants namespace so process.getBuiltinModule("constants") matches the imported/default namespace identity
• add focused parity coverage for default, namespace, named imports, module-specific equality, and process.getBuiltinModule

Fixes #2571

Verification

• cargo fmt --all -- --check
• jq empty test-parity/known_failures.json test-parity/threshold.json
• git diff --check
• ./scripts/check_file_size.sh
• RUSTC_WRAPPER= cargo check -p perry-api-manifest -p perry-codegen -p perry-runtime
• RUSTC_WRAPPER= cargo test -p perry-api-manifest
• RUSTC_WRAPPER= cargo test -p perry-codegen --test manifest_consistency
• PATH=/home/github-runner/actions-runner/externals/node24/bin:$PATH RUSTC_WRAPPER= ./run_parity_tests.sh --suite node-suite --module constants --filter flat-alias
• RUSTC_WRAPPER= ./scripts/regen_api_docs.sh
• git diff --check --cached

[andrewtdiz]

Rebased onto current main (94bbda1a) and force-pushed a2015047; #2769 is now mergeable on GitHub (checks pending/blocking only). Re-resolved generated docs via RUSTC_WRAPPER= ./scripts/regen_api_docs.sh and reran verification:\n\n- RUSTC_WRAPPER= target/release/perry test-parity/node-suite/constants/imports/flat-alias.ts -o /tmp/perry_constants_alias_2571_rebased && /tmp/perry_constants_alias_2571_rebased\n- PATH=/home/github-runner/actions-runner/externals/node24/bin:/root/.codex/tmp/arg0/codex-arg0315Laj:/usr/local/lib/node_modules/@openai/codex/node_modules/@openai/codex-linux-x64/vendor/x86_64-unknown-linux-musl/codex-path:/root/.local/bin:/root/.cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin RUSTC_WRAPPER= ./run_parity_tests.sh --suite node-suite --module constants --filter flat-alias (1/1, report test-parity/reports/parity_report_20260529_232417.json)\n- cargo fmt --all -- --check\n- git diff --check origin/main...HEAD\n- ./scripts/check_file_size.sh\n- jq empty test-parity/known_failures.json test-parity/threshold.json\n- RUSTC_WRAPPER= cargo check -p perry-api-manifest -p perry-runtime\n- RUSTC_WRAPPER= cargo test -p perry-api-manifest\n- RUSTC_WRAPPER= cargo test -p perry-codegen --test manifest_consistency