Fix owner team access mode value in team_unit table (#24224)

Partly backport #23675

Co-authored-by: Giteabot <teabot@gitea.io>

models/organization/org.go

@@ -338,9 +338,10 @@ func CreateOrganization(org *Organization, owner *user_model.User) (err error) {
 	units := make([]TeamUnit, 0, len(unit.AllRepoUnitTypes))
 	for _, tp := range unit.AllRepoUnitTypes {
 		units = append(units, TeamUnit{
-			OrgID:  org.ID,
-			TeamID: t.ID,
-			Type:   tp,
+			OrgID:      org.ID,
+			TeamID:     t.ID,
+			Type:       tp,
+			AccessMode: perm.AccessModeOwner,
 		})
 	}