fix abortsignal event names

[Monti-27]

Fixes #5260.

This makes AbortSignal.addEventListener ignore non abort event names instead of throwing.
It keeps the abort listener path the same and adds tests for ignored event names.

Tests:

• cargo test -p boa_runtime abort --lib
• cargo test -p boa_runtime --lib
• cargo clippy -p boa_runtime --all-features --all-targets -- -D warnings

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	53,125	53,125	0
Passed	51,049	51,049	0
Ignored	1,482	1,482	0
Failed	594	594	0
Panics	0	0	0
Conformance	96.09%	96.09%	0.00%

Tested main commit: d6d76d86e9e18fca07f318f1db434cc8abffaf14
Tested PR commit: 72e45f22ea16a1471048625e13553cf40f984f64
Compare commits: d6d76d8...72e45f2

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.71%. Comparing base (6ddc2b4) to head (72e45f2).
⚠️ Report is 949 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5269       +/-   ##
===========================================
+ Coverage   47.24%   59.71%   +12.46%     
===========================================
  Files         476      589      +113     
  Lines       46892    63668    +16776     
===========================================
+ Hits        22154    38018    +15864     
- Misses      24738    25650      +912     

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[jedel1043]

LGTM! Nice work!