Input/Output linting prevents usage of Environment Variables

[AndreasBergmeier6176]

When having Linting like in:

connect/internal/impl/kafka/input_kafka_franz.go

Line 61 in 5a64fed

"a consumer group is mandatory when not using explicit topic partitions"

it forces Unit-Testing to fail since at lint time, the Environment Variables are not yet set and then in turn the lint check fails.
This change broke some of our pipelines recently.

[mihaitodor]

Hey @AndreasBergmeier6176, thanks for raising that! Would it be possible for you to set a default value for your environment variables? For example ${CONSUMER_GROUP:whatever} (you can also do ${FOOBAR:} if an empty string is a valid default value)? Otherwise, it would be really difficult to come up with a selective linting scheme for tests which is somehow different than the linting scheme used outside of tests.

LE: Moving to a discussion as per #2026.