fix(util): validate system error helpers

[andrewtdiz]

Summary

• validate util.getSystemErrorName(err) and util.getSystemErrorMessage(err) inputs with Node-shaped ERR_INVALID_ARG_TYPE / ERR_OUT_OF_RANGE behavior
• require negative safe-integer error codes before libuv lookup, including unsafe integer range formatting
• align the Linux libuv error map entries so getSystemErrorMap() has Node's 85-entry shape and the expected EFTYPE / EUNATCH / EREMOTEIO / ENONET keys
• update the util parity gap counts for the covered system-error helpers

Issues

Closes #3022
Refs #2514

Why This Cut

The validation gap and the existing node-suite/util/get-system-error map-size mismatch share the same util_syserr lookup path and one deterministic parity fixture. The broader #2514 tracker remains open for unrelated util helpers.

Tests Added

• expanded test-parity/node-suite/util/get-system-error.ts with invalid input validation, unsafe integer handling, and Linux libuv alias/map-size probes
• added focused util_syserr Rust unit coverage for range-number formatting and Linux libuv alias entries

Verification

• pre-fix expanded fixture failed on the expected output mismatch: test-parity/reports/parity_report_20260531_005655.json
• post-fix/rebase focused fixture passed 1/1: test-parity/reports/parity_report_20260531_011354.json
• post-fix/rebase full util suite passed 74/74: test-parity/reports/parity_report_20260531_011516.json
• TMPDIR="$PWD/target/tmp" RUSTC_WRAPPER= cargo test -p perry-runtime util_syserr passed with existing warnings
• TMPDIR="$PWD/target/tmp" CARGO_BUILD_JOBS=1 RUSTC_WRAPPER= cargo check -p perry-runtime -p perry-codegen -p perry-api-manifest passed with existing warnings
• cargo fmt --all -- --check
• git diff --check HEAD
• ./scripts/check_file_size.sh

Known Limitations

• This does not close the broad node:util: implement remaining top-level helper APIs #2514 tracker; remaining unrelated util helper APIs are still tracked there.
• Platform-specific libuv alias coverage is asserted for the Linux parity environment used by the suite.

Non-goals

• No changes to util.debuglog, util.diff, util.parseEnv, MIME helpers, or other node:util APIs.