[Backport 6.2] fix(sct lib): raft topology errors during rolling upgrade ignoration …

[mergify]

…added

fixes: #9511
Such a change is needed to ignore expected raft topology errors that never lead to failure. To reduce argus events at first place

Testing

Regular expression been tested locally and within this job:
https://jenkins.scylladb.com/job/scylla-staging/job/eugene_test_folder/job/rolling_upgrades_test/14/

PR pre-checks (self review)

• I added the relevant backport labels
• I didn't leave commented-out/debugging code

Reminders

• Add New configuration option and document them (in sdcm/sct_config.py)
• Add unit tests to cover my changes (under unit-test/ folder)
• Update the Readme/doc folder relevant to this change (if needed)

(cherry picked from commit f867079)

Parent PR: #9584