Find a way to use test profile generated in codecov upload instead of running tests twice

[soypat]

This:

go-module-template/.github/workflows/go.yml

Line 44 in 8f73bb2

go test -v -coverprofile=coverage.txt -covermode=atomic ./...

Is a duplicate of:

go-module-template/.github/workflows/go.yml

Line 28 in 8f73bb2

run: go test -v -coverprofile=coverage.txt -covermode=atomic ./...

Better to be able to reuse work from previous steps