[CG] Add AAA Parcel

[JimOverholt]

Example:

aaa = AAA(
    parcel_name="test",
    parcel_description="test2",
    server_auth_order=Global[List[str]](value=['local']),
)

aaa.add_authorization_rule(
    rule_id="1",
    method="commands",
    level="15",
    group=["local"],
    if_authenticated=False
)
aaa.add_authorization_rule(
    rule_id="2",
    method="commands",
    level="1",
    group=["local"],
    if_authenticated=False
)

aaa.add_radius_group(
    group_name="radius-1",
    vpn=0,
    radius_servers=[
        RadiusServerItem(
            address=as_global(IPv4Address("1.1.1.1")),
            key=as_global("password")
        ),
        RadiusServerItem(
            address=as_global(IPv4Address("2.2.2.2")),
            key=as_global("password")
        )
    ]
)

[JimOverholt]

This issue was migrated from an old repository: CiscoDevNet/catalystwan#478