add `prefect profiles populate-defaults` CLI command (#14749) #15839

Job	Run time
docker, python:3.9	5m 21s
docker, python:3.9	5m 21s
docker, python:3.10	4m 58s
docker, python:3.10	4m 58s
docker, python:3.11	4m 55s
docker, python:3.11	4m 55s
docker, python:3.12	5m 16s
docker, python:3.12	5m 16s
Server Tests - python:3.9, postgres:14	3m 21s
Server Tests - python:3.9, postgres:14	3m 21s
Server Tests - python:3.10, postgres:14	3m 23s
Server Tests - python:3.10, postgres:14	3m 23s
Server Tests - python:3.11, postgres:14	3m 21s
Server Tests - python:3.11, postgres:14	3m 21s
Server Tests - python:3.12, postgres:14	3m 26s
Server Tests - python:3.12, postgres:14	3m 26s
Server Tests - python:3.9, sqlite	5m 7s
Server Tests - python:3.9, sqlite	5m 7s
Server Tests - python:3.10, sqlite	5m 19s
Server Tests - python:3.10, sqlite	5m 19s
Server Tests - python:3.11, sqlite	4m 29s
Server Tests - python:3.11, sqlite	4m 29s
Server Tests - python:3.12, sqlite	5m 20s
Server Tests - python:3.12, sqlite	5m 20s
Client Tests - python:3.9, postgres:14	6m 59s
Client Tests - python:3.9, postgres:14	6m 59s
Client Tests - python:3.10, postgres:14	7m 2s
Client Tests - python:3.10, postgres:14	7m 2s
Client Tests - python:3.11, postgres:14	6m 20s
Client Tests - python:3.11, postgres:14	6m 20s
Client Tests - python:3.12, postgres:14	7m 9s
Client Tests - python:3.12, postgres:14	7m 2s
	2h 43m 25s

Provide feedback