fix(data-warehouse): data warehouse scene ui updates

[EDsCODE]

Problem

• no loading state for data warehouse tables
• no refreshed at on info column
• confusing when there's a lot of tables

Changes

• add spinner

• add last synced at on info column

• group source types together

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

How did you test this code?

[github-actions]

Size Change: 0 B

Total Size: 824 kB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	824 kB

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