Expose resource defaults via MondooAuditconfig

[czunker]

Is your feature request related to a problem? Please describe.
When users want to change the resource usage, it's tedious for them to find out the defaults and then change the config.

The process would be easier when we expose the defaults via the MondooAuditconfig.

Currently users would need to check the code:

mondoo-operator/pkg/utils/k8s/resources_requirements.go

Line 36 in 4d7bf13

Or check the running objects.

Describe the solution you'd like
Set the resources via defaults for the MondooAuditconfig fields.

Describe alternatives you've considered
Docs or keep it as is.

Additional context