Ability to set debug log-level on MetalLB Speaker pods

1. Proposed title of this feature request

   Ability to set debug log-level on MetalLB Speaker pods

2. What is the nature and description of the request?

    Ability to set debug log-level on MetalLB Speaker pods via the metallbs resource spec.

3. Why does the customer need this? (List the business requirements here)

   For troubleshooting purposes setting debug for log-level is needed.

4. List any affected packages or components.

MetalLB