chore: Miscellaneous backports

[jaw0r3k]

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

Backports:

Yeah quite much backported there

• feat(ClientPresence): allow setting activity state #9743
• typings: Make activity name required #9765
• fix(types): fixed CachedManager constructor arguments in type #9761
• fix(Action): Do not set undefined values #9755
• feat(ClientApplication): Approximate guild count and new GET route #9713
• feat(Role): add flags #9694
• feat(Attachment): add flags #9686
• feat(Client): add guildAvailable event #9692
• types(BaseButtonComponentData): Narrow component type #9735

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
• This PR changes the library's interface (methods or parameters added)
• This PR includes breaking changes (methods removed or renamed, parameters moved or removed)

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

2 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
discord-js	⬜️ Ignored (Inspect)	Visit Preview		Nov 4, 2023 10:21pm
discord-js-guide	⬜️ Ignored (Inspect)	Visit Preview		Nov 4, 2023 10:21pm

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	84
🟢 Accessibility	96
🟢 Best practices	100
🟠 SEO	67
🔴 PWA	33

Lighthouse ran on https://discord-js-git-fork-jaw0r3k-mass-backport-discordjs.vercel.app/

[Qjuh]

These are feats added as well, not just fixes. This should be reflected in the PR title. Also backporting so many different things at once means the changelog will mention all of this as just „Miscellaneous fixes“.