Add default owner team to privated_org and limited_org in unit test (#23109)

Related to https://github.com/go-gitea/gitea/pull/22705 's CI result
[here](https://drone.gitea.io/go-gitea/gitea/68043/2/16)
> IsOrganizationOwner() [E] [63f61849-7] Organization does not have
owner team: 23

models/fixtures/team.yml

@@ -151,3 +151,25 @@
   num_members: 1
   includes_all_repositories: false
   can_create_org_repo: true
+
+-
+  id: 15
+  org_id: 22
+  lower_name: owners
+  name: Owners
+  authorize: 4 # owner
+  num_repos: 0
+  num_members: 0
+  includes_all_repositories: false
+  can_create_org_repo: true
+
+-
+  id: 16
+  org_id: 23
+  lower_name: owners
+  name: Owners
+  authorize: 4 # owner
+  num_repos: 0
+  num_members: 0
+  includes_all_repositories: false
+  can_create_org_repo: true

models/fixtures/user.yml

@@ -807,7 +807,7 @@
   num_following: 0
   num_stars: 0
   num_repos: 2
-  num_teams: 0
+  num_teams: 1
   num_members: 0
   visibility: 1
   repo_admin_change_team_access: false
@@ -844,7 +844,7 @@
   num_following: 0
   num_stars: 0
   num_repos: 2
-  num_teams: 0
+  num_teams: 1
   num_members: 0
   visibility: 2
   repo_admin_change_team_access: false