Do not call global Params() when chainman is in scope

Summary:
Some of the callsite in the original PR do not exist in our codebase or use a config.GetChainParams()

This is a partial backport of core#25168
https://github.com/bitcoin/bitcoin/pull/25168/commits/fa1b76aeb064b315a3767a8f59836ca18aeb117e

Depends on D14599

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D14600