Remove custom commands on find.ts such as findButton

[luixxiul]

Based on the internal discussion among employees on a private room and the comment here, the custom commands on find.ts such as findButton need to be removed.

Existing lines should be able to be easily replaced with regex, fortunately.

• cypress/e2e/audio-player/audio-player.spec.ts - 10537
• cypress/e2e/composer/composer.spec.ts - 10538
• cypress/e2e/create-room/create-room.spec.ts - 10542
• cypress/e2e/crypto/decryption-failure.spec.ts - 10541
• cypress/e2e/editing/editing.spec.ts - 10543
• cypress/e2e/timeline/timeline.spec.ts - 10540

Here is the list of E2E Cypress tests: #25033

[luixxiul]

I confirmed those custom commands have been removed.