Add scripts/no-trusted-dealer-guard.sh: greps non-test .go in the consensus
tree for NewTrustedDealer / func GenerateKeys / GenerateDualKeys /
GenerateThresholdKeys / GenerateDualThresholdKeys and exits non-zero if any
land in production code. Wired as a prerequisite of `make test` and
`make security` so the regression that dropped the test-only relocation
(97b2dfe7c) on a merge cannot silently return.
Also delete the stale polaris.go comment "Produced by the
pulsar.ThresholdSigner ceremony" — that v0.1 reconstruct-then-sign Combine
path was ripped; the leg is filled by the corrected lattice kernel.