Implement the agent load generator input+integration

[jlind23]

1. Update repository settings/templates #24
2. Create a minimal packaging process #5
3. Update Go version to 1.18.x #25
4. Unit tests and lint infrastructure #26
5. Implement the load generator core functionality #27
6. Configuration reading/parsing/testing #28
7. Connecting and sending data to Shipper #29
8. Create a test suite for testing inputs in a language agnostic manner #3
9. Integration tests #30
10. Developer documentation #31
11. Integrate with Elastic Agent #32
12. V2 control protocol #33
13. V2 status reporting #35
14. Load generator integration #34
15. [META] Create build pipelines and packaging steps for all Elastic Agent subcomponents elastic-agent#592

[belimawr]

I broke down the work into smaller issues, here is the, somehow, ordered list:

1. Update repository settings/templates #24
2. Create a minimal packaging process #5
3. Update Go version to 1.18.x #25
4. Unit tests and lint infrastructure #26
5. Implement the load generator core functionality #27
6. Configuration reading/parsing/testing #28
7. Connecting and sending data to Shipper #29
8. Create a test suite for testing inputs in a language agnostic manner #3
9. Integration tests #30
10. Developer documentation #31
11. Integrate with Elastic Agent #32
12. V2 control protocol #33
13. V2 status reporting #35
14. Load generator integration #34
15. [META] Create build pipelines and packaging steps for all Elastic Agent subcomponents elastic-agent#592

[jlind23]

Thanks @belimawr for the work. I moved those items to the issue's description.