Harness tests don't show expected "integration tests" mode logs

[yaronya]

Refers to the code added in #578
If you run harness tests in GH action while turning INTEGRATION_TEST mode on - you'd see only the logs performed by the harness.go file and wouldn't see any other logs (for example, the ones that are performed by provider.go)

It may have to do with the fact that the harness tests and TF aren't running on the same process.

[TomerHeber]

@yaronya - I think this was always the case.
Only on failure would it show logs.

Is the ask to change that?

[TomerHeber]

If yes... which log level would we like to show?

[yaronya]

We haven't seen any logs - for either failure or non-failure

I think we'd like to always see these logs in case INTEGRATION_TESTS is turned on - we get failures and we don't know if the test retried or not.
Let's start with INFO log level - we could always change that later on.