Add BGP route redistribution object

[jgomezve]

@danischm

Couple of comments questions about this PR:

• The attribute protocol_instance is used in the dn. Thus id: True. For static and direct protocols this should be set to none, I was expecting to use a default value, but default values do not work for attributes with id: True. I decided then to put this information in the attribute description

  terraform-provider-nxos/gen/definitions/bgp_route_redistribution.yaml

  Line 72 in 22ea257

  - nxos_name: inst

• What about improving the logic of the .tf example to just considers the attributes with the key example set ? For this particular resource I did not set the example key for the attribute srv6_prefix_type. Nonetheless, it is still shown in the .tf example. https://github.com/CiscoDevNet/terraform-provider-nxos/blob/jg-bgp-interleak/examples/resources/nxos_bgp_route_redistribution/resource.tf