Keypers don't vote for transitions to new keyper sets they are not a member of

[jannikluhn]

Keypers send BlockSeen messages to implicitly vote to transition to keyper sets activated prior to this block number. However, they only do this for keyper sets they are a member of:

rolling-shutter/rolling-shutter/keyper/keyper.go

Line 230 in e46a6f6

count, err := q.CountBatchConfigsInBlockRangeWithKeyper(ctx,

This means that transitioning away from one keyper set potentially doesn't work, as only new keypers would vote on it, but they don't have voting power.