LB_ALGORITHM_SOURCE_IP_PORT is an algorithm used by OVN
Load Balancer [0]. This patch adds its support to the API.
[0] https://review.opendev.org/#/c/660369
Depends-On: I605f44f0f50219aa003df477de9bae4062f3c308
Change-Id: I436a6e553065d1755d465d20ad36f7ba2cbb8eba
Task: 35952
Story: 2006264