SystemServer+LoginServer+Userland: Switch to sid-based sockets

This commit does three things atomically:
- switch over Core::Account+SystemServer+LoginServer to sid based socket
  names.
- change socket names with %uid to %sid.
- add/update necessary pledges and unveils.

Userland: Switch over servers to sid based sockets

Userland: Properly pledge and unveil for sid based sockets

Userland/Libraries/LibCore/LocalServer.cpp

@@ -4,9 +4,9 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <LibCore/Account.h>
 #include <LibCore/LocalServer.h>
 #include <LibCore/Notifier.h>
+#include <LibCore/SessionManagement.h>
 #include <LibCore/Stream.h>
 #include <LibCore/System.h>
 #include <LibCore/SystemServerTakeover.h>
@@ -38,7 +38,7 @@ ErrorOr<void> LocalServer::take_over_from_system_server(String const& socket_pat
     if (m_listening)
         return Error::from_string_literal("Core::LocalServer: Can't perform socket takeover when already listening");
 
-    auto const parsed_path = Core::Account::parse_path_with_uid(socket_path);
+    auto const parsed_path = TRY(Core::SessionManagement::parse_path_with_sid(socket_path));
     auto socket = TRY(take_over_socket_from_system_server(parsed_path));
     m_fd = TRY(socket->release_fd());