[LHN Mismatch] Send SetCollection instead of MergeCollection

[puneetlath]

We are going to be changing the behavior of OpenApp/ReconnectApp when it does a full reconnect to replace the full reports list that the client has stored instead of merging with it.

To do this, we will first need to make the client-side changes in #51864 and #51867. Once those are done, we will want to:

1. Make sure all apps, including HybridApp, are updated to a version that supports both of the above changes
2. Set a minimum api version that supports the above changes
3. Update ReconnectApp to start returning SetCollection instead of MergeCollection when doing a full reconnect

[melvin-bot]

Current assignee @puneetlath is eligible for the NewFeature assigner, not assigning anyone new.

[puneetlath]

We're making good progress on the front-end PRs. Not ready to do this yet though.

[puneetlath]

PR is here: https://github.com/Expensify/Web-Expensify/pull/44526. Going to do a short-lived beta just so that we can test this with a few people before rolling it out to everyone.

[puneetlath]

All internal employees are on the beta. Now working on getting rid of the beta and making this a normal feature for everyone.

[puneetlath]

This is live on production.