[bug]: KubeOps.Cli runs into an error when a generic class is inherited from ValidationWebhook

[dsempi]

Describe the bug

If there is a generic class inherited from ValidationWebhook class which contains some shared functionality for multiple entities, it's being processed by the AssemblyLoader as if it was the final webhook. When resolving the entity type, it runs into an error "Value cannot be null. (Parameter 'name')".

To reproduce

1. Let's have a class like:

public class V1EntityValidator<TEntity> : ValidationWebhook<TEntity> where TEntity : CustomKubernetesEntity<V1Spec>
{
    protected V1EntityValidator()
    {
    }

    public override ValidationResult Create(TEntity entity, bool dryRun)
    {
      // do some basic validation
    }
    ...
}

2. Let's have an inherited class like:

[ValidationWebhook(typeof(V1MyResource))]
public class V1MyResourceValidator : V1EntityValidator<V1MyResource>
{
}

3. Compile the project. The GenerateOperatorResources target fails with the following error:

An error occurred whiled executing Command: operator
Value cannot be null. (Parameter 'name')

Expected behavior

Compilation runs without an error and the operator resources get generated.

Screenshots

No response

Additional Context

I've prepared a Pull Request that fixes the issue, please see #816.