Add host mode rehydration

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Host Test Results

    1 files  ±  0      1 suites  ±0   1h 28m 25s ⏱️ - 9m 30s
1 733 tests  - 164  1 717 ✅  - 163  16 💤  - 1  0 ❌ ±0 
1 747 runs   - 165  1 731 ✅  - 164  16 💤  - 1  0 ❌ ±0 

Results for commit 4c212ed. ± Comparison against base commit a9dc70b.

This pull request removes 164 tests.

Chrome ‑ Acceptance | code-submode | card playground > error handling: it can clear card-creation error (that resulted in new file in the realm) when different card-def is selected
Chrome ‑ Acceptance | code-submode | card playground > error handling: it can clear card-creation error for a failing field
Chrome ‑ Acceptance | code-submode | card playground > error handling: it can clear card-creation error that did not result in new file in the realm
Chrome ‑ Acceptance | code-submode | card playground > error handling: it can render stale card in edit format when the server is in an error state for the card
Chrome ‑ Acceptance | code-submode | card playground > error handling: it can render the last known good state for card with error when the not in the edit format
Chrome ‑ Acceptance | code-submode | card playground > error handling: it renders a module error
Chrome ‑ Acceptance | code-submode | card playground > error handling: it renders a playground instance with an error that has does not have a last known good state
Chrome ‑ Acceptance | code-submode | card playground > error handling: it renders error info when creating new instance causes error after file was created in realm
Chrome ‑ Acceptance | code-submode | card playground > error handling: it renders error message for missing file
Chrome ‑ Acceptance | code-submode | card playground > error handling: it renders error message for non-existent link in relationship field
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♻️ This comment has been updated with latest results.