Use logp.NewNopLogger to avoid panic on test

[belimawr]

Proposed commit message

Use logp.NewNopLogger on TestRunnerFactoryWithCommonInputSettings to avoid panic: "
Log in goroutine after TestRunnerFactoryWithCommonInputSettings has completed"

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works. Where relevant, I have used the stresstest.sh script to run them under stress conditions and race detector to verify their stability.
• I have added an entry in ./changelog/fragments using the changelog tool.

## Disruptive User Impact
## Author's Checklist

How to test this PR locally

go test -v -count=1 -run=TestRunnerFactoryWithCommonInputSettings ./filebeat/channel

## Related issues
## Use cases
## Screenshots
## Logs

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

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