fix(WebSocketShard#destroy): wait for close and cleanup listeners

[didinele]

Please describe the changes this PR makes and why it should be merged:
This is yet another attempt at fixing the exact same problem as #8399 and #8405

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• 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 16, 2022 at 3:31PM (UTC)

[codecov]

Codecov Report

Merging #8479 (a937d0c) into main (a1dddd6) will decrease coverage by 0.20%.
The diff coverage is 0.00%.

❗ Current head a937d0c differs from pull request most recent head effd55b. Consider uploading reports for the commit effd55b to get more accurate results

@@            Coverage Diff             @@
##             main    #8479      +/-   ##
==========================================
- Coverage   86.49%   86.29%   -0.21%     
==========================================
  Files          87       87              
  Lines        8339     8297      -42     
  Branches     1104     1104              
==========================================
- Hits         7213     7160      -53     
- Misses       1083     1094      +11     
  Partials       43       43              

Flag	Coverage Δ
builders	100.00% <ø> (ø)
collection	100.00% <ø> (ø)
proxy	73.28% <ø> (ø)
rest	92.53% <ø> (ø)
utilities	100.00% <ø> (ø)
voice	64.08% <ø> (ø)
ws	59.47% <0.00%> (-0.82%)	⬇️

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Impacted Files	Coverage Δ
packages/ws/src/ws/WebSocketShard.ts	22.41% <0.00%> (-0.45%)	⬇️
packages/ws/src/ws/WebSocketManager.ts	98.54% <0.00%> (-0.06%)	⬇️
packages/ws/src/utils/utils.ts	100.00% <0.00%> (ø)
packages/collection/src/collection.ts	100.00% <0.00%> (ø)

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