src: fast path empty native immediate drain

[gurgunday]

RunAndClearNativeImmediates is called from CheckImmediate on every event loop tick, but most calls have no native immediates queued

• Add a fast path that checks the three queues that are drained here. If all three are empty, return before creating any V8 handles or scopes
• Use the same check in CheckImmediate, along with a JS immediate existance check, to exit even earlier

Before:

./node benchmark/run.js --filter immediate.js --set type=depth --set n=5000000 timers
timers/immediate.js
timers/immediate.js type="depth" n=5000000: 77,957.7280919732

./node benchmark/run.js --filter immediate.js --set type=depth1 --set n=5000000 timers
timers/immediate.js
timers/immediate.js type="depth1" n=5000000: 78,239.25105583081

./node benchmark/run.js --filter set-immediate-depth-args.js --set n=5000000 timers
timers/set-immediate-depth-args.js
timers/set-immediate-depth-args.js n=5000000: 77,728.55421361701

After:

./node benchmark/run.js --filter immediate.js --set type=depth --set n=5000000 timers
timers/immediate.js
timers/immediate.js type="depth" n=5000000: 81,438.54733112443

./node benchmark/run.js --filter immediate.js --set type=depth1 --set n=5000000 timers
timers/immediate.js
timers/immediate.js type="depth1" n=5000000: 81,920.65230335212

./node benchmark/run.js --filter set-immediate-depth-args.js --set n=5000000 timers
timers/set-immediate-depth-args.js
timers/set-immediate-depth-args.js n=5000000: 80,653.84783982178

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.65%. Comparing base (c202696) to head (1584afc).
⚠️ Report is 479 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #62969      +/-   ##
==========================================
- Coverage   89.66%   89.65%   -0.02%     
==========================================
  Files         706      706              
  Lines      219416   219424       +8     
  Branches    42073    42077       +4     
==========================================
- Hits       196738   196718      -20     
- Misses      14576    14591      +15     
- Partials     8102     8115      +13     

Files with missing lines	Coverage Δ
src/env.cc	85.31% <100.00%> (-0.22%)	⬇️
src/env.h	98.14% <ø> (ø)

... and 21 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/73989/

[nodejs-github-bot]

Landed in 4fb667e