tree cd92db5a97645f04194064dde28ece3f6a136a36
parent 75abcfd173f35737ee0fa565ad6dd297d38e934e
author Gleb Zimin <gzimin@mirantis.com> 1651042898 +0400
committer Ekaterina Chernova <efedorova@mirantis.com> 1655295918 +0300

Do not test subnetpools in TF case

TF do not support subnet_allocation extension.
Also bring new method, that can be used as common in
tests to check TF backend.

Related-Prod: https://mirantis.jira.com/browse/PRODX-23390
Change-Id: I369de0530e940c3ddd35541f175f420e576063c5
(cherry picked from commit f72e994971549dddfddef913703156b90b4335e6)