Don't log RandAddSeedPerfmon details
These are hard to deal with, as in a follow-up this function can get
called before the logging infrastructure is initialized.
Partial Backport of Core PR14955
Depends on D4387
Reviewers: deadalnix, Fabien, jasonbcox, O1 Bitcoin ABC, #bitcoin_abc
Reviewed By: jasonbcox, O1 Bitcoin ABC, #bitcoin_abc
Differential Revision: https://reviews.bitcoinabc.org/D4389