timers: refactor to use optional chaining

[Lxxyx]

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[aduh95]

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/874/console

No regressions or improvements

 confidence improvement accuracy (*) (**) (***)
timers/timers-cancel-pooled.js n=5000000 -0.96 % ±9.53% ±12.68% ±16.51%
timers/timers-cancel-unpooled.js direction='end' n=1000000 4.08 % ±7.54% ±10.04% ±13.07%
timers/timers-cancel-unpooled.js direction='start' n=1000000 -2.81 % ±5.86% ±7.80% ±10.16%
Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 3 comparisons, you can thus
expect the following amount of false-positive results:
0.15 false positives, when considering a 5% risk acceptance (*, **, ***),
0.03 false positives, when considering a 1% risk acceptance (**, ***),
0.00 false positives, when considering a 0.1% risk acceptance (***)

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35327/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35332/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35333/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35399/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/35402/

[jasnell]

Landed in d8f535b

[mcollina]

As part of #37937, I tracked down a regression introduced by this one.

With optional chaining:

Without optional chaining: