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.

Userland/Utilities/pls.cpp

@@ -36,7 +36,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         if (account.has_password()) {
             auto password = TRY(Core::get_password());
             if (!account.authenticate(password))
-                return Error::from_string_literal("Incorrect or disabled password."sv);
+                return Error::from_string_literal("Incorrect or disabled password.");
         }
     }