Merge rsk branch into the master branch

[sl1depengwyn]

#8701

Motivation

Changelog

• Added commits from Add rootstock specific fields #8076 and Fix cycle of rootstock fetcher #8099 to the master branch
• Added matrix to run test for all chain types in CI
• Added chain_type/1 function to ConfigHelper

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to https://github.com/blockscout/docs
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables. ENVs for #8742 docs#197
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools