aci-endpoint-group: Support Static AAEP Mappings

[camrossi]

In ACI version 6.1.3, we introduced the capability to create Static AAEP (Attachable Access Entity Profile) mappings directly at the EPG (Endpoint Group) level.

This feature could significantly enhance the aci-endpoint-group module if implemented. However, there is a potential issue to consider:

When an AAEP is mapped to an EPG from the Tenant, a new object of type fvRsAepAtt is created within the EPG.
This triggers a modification in the referenced AAEP, adding an nfraRsFuncToEpg object with a new property called creator: SYSTEM

So I think if the AAEP is managed by NAC it should ignore any infraRsFuncToEpg where the creator is system or at least we need to check if there are impacts in this.

[manofcolombia]

#279 was created in an attempt to handle this.
Currently running into an issue where the annotation in this class is getting overwritten constantly after creation as it seems like it has been used to indicate relationship formation instead of using another dedicated attribute for that.

I will investigate the behavior of having mixed mappings in this current state.