docs: high availability sequencer guide #2435

Job	Run time
Detect code changes	5s
Determine Image Tag	3s
test / Go Mod Tidy Check	32s
proto / buf-check	8s
test / Build All ev-node Binaries	1m 40s
test / Run Integration Tests	2m 0s
lint / golangci-lint	38s
lint / yamllint	12s
lint / markdown-lint	22s
lint / hadolint	14s
lint / goreleaser-check	8s
test / Run Unit Tests	3m 2s
docker / Build ev-node-evm	22m 37s
docker / Build ev-node-testapp	18m 41s
docker / Build ev-node-grpc	19m 55s
test / Run E2E System Tests	12m 52s
test / Run EVM Execution Tests	2m 3s
test / Combine and Upload Coverage	9s
docker-tests / Docker E2E Tests	6m 38s
docker-tests / Docker Upgrade E2E Tests	3m 44s
docker-tests / Docker Compatibility E2E Tests	4m 57s
	1h 40m 40s

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