[NoQA] Revert: Migrate Icon/index.js and FloatingActionButton to function component

[rayane-djouah]

Reverts #26654

to fix #33277

[melvin-bot]

@bondydaa Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

[bondydaa]

assigning @roryabraham since you're on the linked original PR . I'm also confused by this warning, never seen it before.

[bondydaa]

Reviewer Checklist

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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

MacOS: Desktop

[jasperhuangg]

Going to go ahead and merge this and CP

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[OSBotify]

🚀 Deployed to staging by https://github.com/jasperhuangg in version: 1.4.14-2 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	cancelled 🔪
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production by https://github.com/jasperhuangg in version: 1.4.14-6 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	failure ❌
🕸 web 🕸	success ✅