OP Superchain: Mixpanel integration

## What to do? 

We need to modify our current setup a bit for Mixpanel, so it could work with Interop Explorer and other further multichain explorers 

More details in Notion: https://www.notion.so/blockscout/Interop-multichain-explorer-1de3d73641f8809c92cbcf2b97f36d14?source=copy_link#2393d73641f880519820c92e8d7b65ad