types: Allow choice's value type to be strictly inferred

[Jiralite]

Please describe the changes this PR makes and why it should be merged:
The following code will not yield an error despite the type of the option being known:

import { ApplicationCommandOptionType, ApplicationCommandType, Guild } from "discord.js"

declare const guild: Guild;

guild.commands.create({
  name: "test",
  description: "test",
  type: ApplicationCommandType.ChatInput,
  options: [
    {
      type: ApplicationCommandOptionType.String,
      name: "test",
      description: "test",
      choices: [
        {
          name: "test",
          value: 0 // No error!
        },
      ],
      required: true
    }
  ]
});

This pull request strengthens the types around here and resolves #8528.

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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1 Ignored Deployment

Name	Status	Preview	Updated
discord-js	⬜️ Ignored (Inspect)		Aug 20, 2022 at 8:24PM (UTC)

[codecov]

Codecov Report

Merging #8529 (0d25854) into main (8028813) will increase coverage by 7.72%.
The diff coverage is n/a.

❗ Current head 0d25854 differs from pull request most recent head 614bcd4. Consider uploading reports for the commit 614bcd4 to get more accurate results

@@            Coverage Diff             @@
##             main    #8529      +/-   ##
==========================================
+ 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/voice/src/receive/SpeakingMap.ts	100.00% <0.00%> (ø)
...ders/src/components/selectMenu/SelectMenuOption.ts	100.00% <0.00%> (ø)
.../interactions/slashCommands/options/mentionable.ts	100.00% <0.00%> (ø)
packages/voice/src/util/Secretbox.ts	33.33% <0.00%> (ø)
packages/voice/src/audio/AudioPlayerError.ts	0.00% <0.00%> (ø)
packages/voice/src/audio/TransformerGraph.ts	74.60% <0.00%> (ø)
packages/voice/src/util/entersState.ts	100.00% <0.00%> (ø)
packages/collection/src/collection.ts	100.00% <0.00%> (ø)
.../src/interactions/slashCommands/options/boolean.ts	100.00% <0.00%> (ø)
...eractions/slashCommands/SlashCommandSubcommands.ts	100.00% <0.00%> (ø)
... and 55 more

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[SpaceEEC]

Some tests for these would be nice 🙏