Downgrade error log to warn

[anshalshukla]

Issue Addressed

Issue #7966

Proposed Changes

Changes logging level to Warn from Error.

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[eserilev]

hm I dont think downgrading to warn is what I had in mind. I think in the case where backfill is paused due to insufficient peers we can just log a single message. This is a bit more involved that just changing the log level. We want to be able to catch the specific error variant InsufficientPeers and log it accordingly. We also at the moment log a message for each column we have insufficient peers for, it would be better to just log one message.