## Problem
We run the e2e tests across two shards to reduce their duration.
However, one takes longer than the other.
## Solution
Use a currently hidden Playwright feature to balance their load
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Upgraded Playwright test dependency to a newer version for refreshed
test tooling and fixes.
* Adjusted end-to-end test shard weighting to rebalance distribution
across parallel runs.
* **Tests**
* Stabilized several end-to-end editor interactions to make E2E flows
more reliable.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Gildas Garcia
1e59ef9a06