Bug: syncAllConversations may overwhelm servers when executed from accounts with many conversations

[cameronvoell]

Describe the bug

Regardless of server side constraints, we need to ensure that we are not attempting to sync all conversations concurrently.

Expected behavior

Absent API improvements (batching updates for several groups), we should look into some client side batching to make sure that we are not trying to sync many groups and update installations for many groups concurrently.

Steps to reproduce the bug

No response

[cameronvoell]

not sure why github linked this issue to #1577 🤷