Based on changes done in this PR https://github.com/status-im/status-go/pull/5807
we can simplify our client logic a lot.
This results in the removal of many lines of code that are no longer needed
Closes 1st part of #16336
The chain we're using for stickers, collectibles, ens names and other similar activities
is simply determined by the mode the Status app is operating in and it could be either
mainnet or testnet mode. Having that fact in mind we don't need all the calls we were
using in the past for fetching explicitly chain id for each of the sections mentioned above
and that's simplified with these changes.