feat(syncing): detect sequencer double-signs and halt #2527

Job	Run time
Detect code changes	6s
Determine Image Tag	4s
proto / buf-check	10s
test / Go Mod Tidy Check	43s
test / Build All ev-node Binaries	1m 7s
lint / yamllint	9s
test / Run Unit Tests	3m 8s
lint / markdown-lint	19s
lint / goreleaser-check	11s
lint / hadolint	10s
lint / golangci-lint	1m 36s
test / Run Integration Tests	1m 29s
docker / Build ev-node-grpc	19m 13s
docker / Build ev-node-testapp	19m 0s
docker / Build ev-node-evm	19m 14s
test / Run EVM Execution Tests	52s
test / Run E2E System Tests	13m 52s
test / Combine and Upload Coverage	0s
docker-tests	0s
	1h 21m 23s

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