Deprecate aggregate-id and move it to dedicated ethernet container for
for interface's link aggregation parameters. Add port-priority to this
container. Add actor and partner port priority to LACP member state.

Fix version numbering, ordering of yang statements to pass
pyang --lint --strict, and remove default value for port priority

Add config container for LACP aggregate interface member with port-priority
and interface. Change /lacp/interfaces/interface/members/member/interface to
point to the new leaf /lacp/interfaces/interface/members/member/config/interface.
Change /lacp/interfaces/interface/members to config true.

Replaced repeated definition of leaf port-priority with `uses` statement, as per change request.

Co-authored-by: Rob Shakir <[email protected]>

Due to breaking change of changing type for list