fix: invert deletable message types list

[almeidx]

Please describe the changes this PR makes and why it should be merged:
Discord has inverted their deletable message types list to be an undeletable message types list instead:

• Certain message types are not deletable discord/discord-api-docs#6551 (comment)

Replicated this on our side and deprecated the previous DeletableMessageTypes array.

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	Comments	Updated (UTC)
discord-js	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 3, 2024 9:47pm

1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f691658) 58.53% compared to head (d4292c8) 58.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10093      +/-   ##
==========================================
+ Coverage   58.53%   58.57%   +0.03%     
==========================================
  Files         244      244              
  Lines       17267    17309      +42     
  Branches     1244     1250       +6     
==========================================
+ Hits        10107    10138      +31     
- Misses       7115     7126      +11     
  Partials       45       45              

Flag	Coverage Δ
builders	95.56% <ø> (ø)
next	∅ <ø> (∅)
proxy	75.00% <ø> (ø)
rest	92.58% <ø> (-0.33%)	⬇️
website	0.00% <ø> (ø)
ws	52.76% <ø> (ø)

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