Integration to v2 push endpoints

[MarcelGeo]

[MarcelGeo]

if there is some error in push finish /versions-> clean chunks cache

[MarcelGeo]

Finish project info response instead of project version resp.

[MarcelGeo]

@RastoHu
We implemented logic described here: https://github.com/MerginMaps/product/issues/84#issue-3272977881 using:

• A new client.sync_project method where sync is retried when someone else is syncing or the client is accidentally on an already pushed version.

• A new mergin sync command coming to the py-client CLI, implementing the same logic.

• New logic for pushing chunks where chunks are uploaded regardless of who is uploading to the project.

• It should be possible to push chunks from multiple clients simultaneously when using v2 sync.

• more details with diagram see here Push v2 integration #262 (comment)