Run test corpus via regular go test

[applejag]

Expected Behavior

Running go test ./... tests everything we need to test.

Also, if it runs via go test, then we get cover reports from the corpus tests.

Current Behavior

Running corpus tests must be done externally, and we don't get any cover reports from it.

As a result, Codecov can't see what we've tested.

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

• Operating System: linux
• kubectl version: v1.30.1
• kubecolor version: v0.3.3