events: inline hybrid dispatch closures

[slagiewka]

lib: inline createEvent hybrid dispatch closure

Originally added in 16b11cd, it first
had three callers. Now there's only one branch requireing it.

lib: inline iterationCondition hybrid dispatch closure

While more readable, the removed closure overhead unlocks 10-20% in
eventtarget.js benchmark (30 runs).

[slagiewka]

Looks like the convention for commit scope here is either events or lib. I'm fine with both, LMK and I will rewrite these commits.

[avivkeller]

@nodejs/events

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.24%. Comparing base (384d7a4) to head (27fce3a).
⚠️ Report is 75 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #64473      +/-   ##
==========================================
+ Coverage   90.21%   90.24%   +0.03%     
==========================================
  Files         741      741              
  Lines      241608   241680      +72     
  Branches    45534    45542       +8     
==========================================
+ Hits       217972   218110     +138     
+ Misses      15154    15112      -42     
+ Partials     8482     8458      -24     

Files with missing lines	Coverage Δ
lib/internal/event_target.js	99.17% <100.00%> (-0.01%)	⬇️

... and 40 files with indirect coverage changes

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