refactor(e2e): extract shared test helpers to DockerTestSuite #1078

Job	Run time
Determine Image Tag	4s
test / Go Mod Tidy Check	32s
proto / buf-check	10s
test / Run Integration Tests	1m 46s
test / Build All ev-node Binaries	1m 28s
test / Run Unit Tests	2m 58s
lint / golangci-lint	1m 22s
lint / hadolint	10s
lint / goreleaser-check	10s
lint / yamllint	7s
lint / markdown-lint	12s
docker / Build ev-node-evm	17m 58s
docker / Build ev-node-testapp	17m 15s
test / Run EVM Execution Tests	2m 19s
test / Run E2E System Tests	12m 13s
test / Combine and Upload Coverage	13s
docker-tests / Docker E2E Tests	6m 58s
docker-tests / Docker Upgrade E2E Tests	3m 37s
	1h 9m 32s

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