Bump openstacksdk to >1

This patch also vendors the openstack.cloud.subnet
module due to a problem with `disable_gateway_ip`
not being set for newly created subnets[1].

[1]: https://review.opendev.org/c/openstack/ansible-collections-openstack/+/940927

Change-Id: Ia021a1d7b82823c2e7498fdd66da3e2d5c6a8a79
(cherry picked from commit 8ccabb61cb8aa6a86c653cc47e43a648e8e07268)
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2c0ca4e..0fe99aa 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,4 +1,4 @@
-exclude: "^(roles/kube_prometheus_stack/files/jsonnet|charts)"
+exclude: "^(roles/kube_prometheus_stack/files/jsonnet|charts|plugins/modules/subnet.py)"
 
 repos:
   - repo: local