feat(loadgen): adding loadgen binary #2662

Job	Run time
Detect code changes	4s
Determine Image Tag	2s
lint / hadolint	9s
lint / yamllint	17s
lint / goreleaser-check	12s
lint / markdown-lint	3m 39s
test / Go Mod Tidy Check	1m 17s
proto / buf-check	7s
lint / golangci-lint	2m 4s
test / Build All ev-node Binaries	2m 47s
test / Run Integration Tests	2m 14s
test / Run Unit Tests	4m 49s
docker / Build ev-node-evm	34s
docker / Build ev-node-grpc	35s
docker / Build ev-node-testapp	26s
docker / Build ev-node-loadgen	42s
docker-tests	0s
test / Run E2E System Tests	14m 6s
test / Run EVM Execution Tests	2m 13s
test / Combine and Upload Coverage	9s
	36m 26s

Provide feedback