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/System.cpp

@@ -13,6 +13,7 @@
 #include <AK/String.h>
 #include <AK/Vector.h>
 #include <LibCore/File.h>
+#include <LibCore/SessionManagement.h>
 #include <LibCore/System.h>
 #include <limits.h>
 #include <stdarg.h>
@@ -82,7 +83,7 @@ ErrorOr<void> pledge(StringView promises, StringView execpromises)
 
 ErrorOr<void> unveil(StringView path, StringView permissions)
 {
-    auto const parsed_path = Core::Account::parse_path_with_uid(path);
+    auto const parsed_path = TRY(Core::SessionManagement::parse_path_with_sid(path));
 
     Syscall::SC_unveil_params params {
         { parsed_path.characters(), parsed_path.length() },