internal/observation: use log.NoOp for TestContext
Created by: bobheadxi
Loggers should not be initialized before package initialization - https://github.com/sourcegraph/log/pull/34 adds a no-op logger that can be used here.
Test plan
tests pass
Created by: bobheadxi
Loggers should not be initialized before package initialization - https://github.com/sourcegraph/log/pull/34 adds a no-op logger that can be used here.
tests pass