Include endtoend testing in code coverage reports about vitess

[GuptaManan100]

make generate_ci_workflows is something we run when we change something in the code that generates them. The files are already generated and stored in the .github/workflows directory and their generation itself isn't part of the CI/CD pipeline.

[glokta1]

Hi @mattlord, I wanted to take a crack at this but had a little doubt:
At what stage is make generate_ci_workflows being run to generate the e2e tests yml files? Is this happening in the CI/CD pipeline?

[systay]

just to circle back the discussion we've been having on slack here

seems like the codecov is not reporting these numbers accurately. according to this report, the coverage for some packages is reported as 0% because their unit tests live in a different package. (example: go/vt/vtgate/planbuilder/operators is reported to have no test coverage since it is tested from go/vt/vtgate/planbuilder/)

we're working on better numbers