feat(loadgen): adding loadgen binary #2616

Job	Run time
Detect code changes	8s
Determine Image Tag	3s
test / Run Unit Tests	4m 14s
lint / markdown-lint	4m 16s
lint / goreleaser-check	9s
test / Build All ev-node Binaries	2m 44s
lint / hadolint	31s
test / Go Mod Tidy Check	48s
lint / yamllint	13s
proto / buf-check	8s
lint / golangci-lint	1m 30s
test / Run Integration Tests	2m 6s
docker / Build ev-node-evm	20m 55s
docker / Build ev-node-loadgen	15m 57s
docker / Build ev-node-testapp	18m 36s
docker / Build ev-node-grpc	20m 45s
test / Run E2E System Tests	12m 48s
test / Run EVM Execution Tests	2m 19s
test / Combine and Upload Coverage	8s
docker-tests / Docker E2E Tests	8m 1s
docker-tests / Docker Upgrade E2E Tests	4m 19s
docker-tests / Docker Compatibility E2E Tests	4m 52s
	2h 5m 30s

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