fix(data-warehouse): only enable checkbox if sync method is set

[EDsCODE]

Problem

• you can check the sync box on the schema form even without a sync method set up

Changes

• disable unless sync method set up

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

[github-actions]

Size Change: 0 B

Total Size: 1.07 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	1.07 MB

_{compressed-size-action}