Don't return duplicated users who can create org repo (##22560)

- Backport of #22560
  - Currently the function `GetUsersWhoCanCreateOrgRepo` uses a query that is able to have duplicated users in the result, this is can happen under the condition that a user is in team that either is the owner team or has permission to create organization repositories.
  - Add test code to simulate the above condition for user 3, [`TestGetUsersWhoCanCreateOrgRepo`](https://github.com/go-gitea/gitea/blob/a1fcb1cfb84fd6b36c8fe9fd56588119fa4377bc/models/organization/org_test.go#L435) is the test function that tests for this.
  - The fix is quite trivial, which is adding `DISTINCT` keyword to `` `user`.id ``.

Author: Gusted

models/fixtures/team.yml

@@ -140,3 +140,14 @@
   num_members: 1
   includes_all_repositories: false
   can_create_org_repo: false
+
+-
+  id: 14
+  org_id: 3
+  lower_name: teamcreaterepo
+  name: teamCreateRepo
+  authorize: 2 # write
+  num_repos: 0
+  num_members: 1
+  includes_all_repositories: false
+  can_create_org_repo: true

models/fixtures/team_user.yml

@@ -93,3 +93,9 @@
   org_id: 19
   team_id: 6
   uid: 31
+
+-
+  id: 17
+  org_id: 3
+  team_id: 14
+  uid: 2

models/fixtures/user.yml

@@ -104,7 +104,7 @@
   num_following: 0
   num_stars: 0
   num_repos: 3
-  num_teams: 4
+  num_teams: 5
   num_members: 3
   visibility: 0
   repo_admin_change_team_access: false

models/organization/org.go

@@ -402,7 +402,10 @@ func GetUsersWhoCanCreateOrgRepo(ctx context.Context, orgID int64) ([]*user_mode
 		Join("INNER", "`team_user`", "`team_user`.uid=`user`.id").
 		Join("INNER", "`team`", "`team`.id=`team_user`.team_id").
 		Where(builder.Eq{"team.can_create_org_repo": true}.Or(builder.Eq{"team.authorize": perm.AccessModeOwner})).
-		And("team_user.org_id = ?", orgID).Asc("`user`.name").Find(&users)
+		And("team_user.org_id = ?", orgID).
+		Asc("`user`.name").
+		Distinct("`user`.id").
+		Find(&users)
 }
 
 // SearchOrganizationsOptions options to filter organizations

models/organization/org_test.go

@@ -92,11 +92,12 @@ func TestUser_GetTeams(t *testing.T) {
 	org := unittest.AssertExistsAndLoadBean(t, &organization.Organization{ID: 3})
 	teams, err := org.LoadTeams()
 	assert.NoError(t, err)
-	if assert.Len(t, teams, 4) {
+	if assert.Len(t, teams, 5) {
 		assert.Equal(t, int64(1), teams[0].ID)
 		assert.Equal(t, int64(2), teams[1].ID)
 		assert.Equal(t, int64(12), teams[2].ID)
-		assert.Equal(t, int64(7), teams[3].ID)
+		assert.Equal(t, int64(14), teams[3].ID)
+		assert.Equal(t, int64(7), teams[4].ID)
 	}
 }
 
@@ -293,7 +294,7 @@ func TestUser_GetUserTeamIDs(t *testing.T) {
 		assert.NoError(t, err)
 		assert.Equal(t, expected, teamIDs)
 	}
-	testSuccess(2, []int64{1, 2})
+	testSuccess(2, []int64{1, 2, 14})
 	testSuccess(4, []int64{2})
 	testSuccess(unittest.NonexistentID, []int64{})
 }