fix(settings): Fix admin delegation for hidden sections

Webhooks and users did not appear anymore in admin delegation because
only admin sections were considered and not the new delegation sections.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

lib/private/Settings/Manager.php

@@ -338,6 +338,7 @@ public function getAllAllowedAdminSettings(IUser $user): array {
 	#[\Override]
 	public function getAdminDelegatedSettings(): array {
 		$sections = $this->getAdminSections();
+		$sections[self::SETTINGS_DELEGATION] = $this->getSections(self::SETTINGS_DELEGATION);
 		$settings = [];
 		foreach ($sections as $sectionPriority) {
 			foreach ($sectionPriority as $section) {