Everywhere: Split Error::from_string_literal and Error::from_string_view

Error::from_string_literal now takes direct char const*s, while
Error::from_string_view does what Error::from_string_literal used to do:
taking StringViews. This change will remove the need to insert `sv`
after error strings when returning string literal errors once
StringView(char const*) is removed.

No functional changes.

AK/Stream.h

@@ -45,7 +45,7 @@ public:
     {
         if (!handle_any_error())
             return {};
-        return Error::from_string_literal("Stream error"sv);
+        return Error::from_string_literal("Stream error");
     }
 
     virtual void set_recoverable_error() const { m_recoverable_error = true; }