types: Correct EventEmitter.on (static) return type

[InkoHX]

Please describe the changes this PR makes and why it should be merged:

Fix return type of EventEmitter.on (static) to AsyncIterableIterator, AsyncIterator is incorrect.

Status and versioning classification:

• I know how to update typings and have done so, or typings don't need updating

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Name	Status	Preview	Updated
discord-js	✅ Ready (Inspect)	Visit Preview	Aug 20, 2022 at 6:42PM (UTC)

[codecov]

Codecov Report

Merging #8524 (1a5e11f) into main (8028813) will increase coverage by 7.72%.
The diff coverage is n/a.

❗ Current head 1a5e11f differs from pull request most recent head 032ae86. Consider uploading reports for the commit 032ae86 to get more accurate results

@@            Coverage Diff             @@
##             main    #8524      +/-   ##
==========================================
+ Coverage   78.73%   86.45%   +7.72%     
==========================================
  Files          22       87      +65     
  Lines        3503     8462    +4959     
  Branches      320     1105     +785     
==========================================
+ Hits         2758     7316    +4558     
- Misses        741     1103     +362     
- Partials        4       43      +39     

Flag	Coverage Δ
builders	100.00% <ø> (?)
collection	100.00% <ø> (?)
proxy	73.28% <ø> (?)
rest	92.53% <ø> (ø)
utilities	100.00% <ø> (?)
voice	64.08% <ø> (?)
ws	59.57% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/proxy/src/util/util.ts	0.00% <0.00%> (ø)
packages/voice/src/receive/AudioReceiveStream.ts	100.00% <0.00%> (ø)
packages/builders/src/components/ActionRow.ts	100.00% <0.00%> (ø)
packages/voice/src/util/entersState.ts	100.00% <0.00%> (ø)
packages/builders/src/components/Assertions.ts	100.00% <0.00%> (ø)
...ges/builders/src/components/textInput/TextInput.ts	100.00% <0.00%> (ø)
...ackages/voice/src/util/generateDependencyReport.ts	0.00% <0.00%> (ø)
packages/collection/src/collection.ts	100.00% <0.00%> (ø)
packages/builders/src/messages/embed/Embed.ts	100.00% <0.00%> (ø)
packages/builders/src/util/componentUtil.ts	100.00% <0.00%> (ø)
... and 55 more

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