refactor: split justfile into imports #1640

Job	Run time
Determine Image Tag	2s
proto / buf-check	9s
lint / hadolint	12s
lint / yamllint	10s
lint / markdown-lint	18s
test / Run Unit Tests	4s
lint / golangci-lint	32s
test / Run Integration Tests	3s
test / Go Mod Tidy Check	4s
lint / goreleaser-check	9s
test / Build All ev-node Binaries	2s
docker / Build ev-node-testapp	53s
docker / Build ev-node-evm	1m 13s
test / Run E2E System Tests	0s
test / Run EVM Execution Tests	0s
test / Combine and Upload Coverage	0s
docker-tests	0s
	3m 51s

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