chore: Enable person batch exports only on supported destinations

[tomasfarias]

Problem

Simply make the PERSONS_BATCH_EXPORTS flag also conditional on destination.

Changes

Check for destination type before exposing model field.

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

How did you test this code?

[posthog-bot]

📸 UI snapshots have been updated

1 snapshot changes in total. 0 added, 1 modified, 0 deleted:

• chromium: 0 added, 1 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

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[posthog-bot]

📸 UI snapshots have been updated

1 snapshot changes in total. 0 added, 1 modified, 0 deleted:

• chromium: 0 added, 1 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[github-actions[bot]]

Size Change: 0 B

Total Size: 1.06 MB

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| Filename | Size | | :--- | :---: | | `frontend/dist/toolbar.js` | 1.06 MB |

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