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/Account.cpp

@@ -68,15 +68,6 @@ ErrorOr<Account> Account::from_passwd(passwd const& pwd, spwd const& spwd)
     return account;
 }
 
-String Account::parse_path_with_uid(StringView general_path, Optional<uid_t> uid)
-{
-    if (general_path.contains("%uid"sv)) {
-        auto const final_uid = uid.has_value() ? uid.value() : getuid();
-        return general_path.replace("%uid"sv, String::number(final_uid), ReplaceMode::All);
-    }
-    return general_path;
-}
-
 ErrorOr<Account> Account::self([[maybe_unused]] Read options)
 {
     Vector<gid_t> extra_gids = TRY(Core::System::getgroups());
@@ -149,14 +140,6 @@ bool Account::authenticate(SecretString const& password) const
     return hash != nullptr && AK::timing_safe_compare(hash, m_password_hash.characters(), m_password_hash.length());
 }
 
-ErrorOr<void> Account::create_user_temporary_directory_if_needed() const
-{
-    auto const temporary_directory = String::formatted("/tmp/user/{}", m_uid);
-    auto directory = TRY(Core::Directory::create(temporary_directory, Core::Directory::CreateDirectories::Yes));
-    TRY(directory.chown(m_uid, m_gid));
-    return {};
-}
-
 ErrorOr<void> Account::login() const
 {
     TRY(Core::System::setgroups(m_extra_gids));