fix: respect PrivateLabelingSetting on project for login texts (#8744)

# Which Problems Are Solved

Admins can set the branding to be used from the project's organization.
Until now, only the branding (colors) were respected, but texts were
still loaded from the user's organization.

# How the Problems Are Solved

Respect the setting when loading the texts for the login pages.

# Additional Changes

None

# Additional Context

- closes #8502

internal/auth/repository/eventsourcing/eventstore/auth_request.go

@@ -726,7 +726,7 @@ func (repo *AuthRequestRepo) fillPolicies(ctx context.Context, request *domain.A
 		request.DefaultTranslations = defaultLoginTranslations
 	}
 	if len(request.OrgTranslations) == 0 || request.PolicyOrgID() != orgID {
-		orgLoginTranslations, err := repo.getLoginTexts(ctx, orgID)
+		orgLoginTranslations, err := repo.getLoginTexts(ctx, request.PrivateLabelingOrgID(orgID))
 		if err != nil {
 			return err
 		}