Everywhere: Add sv suffix to strings relying on StringView(char const*)

Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).

No functional changes.

Userland/Libraries/LibCore/LocalServer.cpp

@@ -120,7 +120,7 @@ ErrorOr<NonnullOwnPtr<Stream::LocalSocket>> LocalServer::accept()
     int accepted_fd = ::accept(m_fd, (sockaddr*)&un, &un_size);
 #endif
     if (accepted_fd < 0) {
-        return Error::from_syscall("accept", -errno);
+        return Error::from_syscall("accept"sv, -errno);
     }
 
 #ifdef AK_OS_MACOS