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/du.cpp

@@ -128,7 +128,7 @@ ErrorOr<off_t> print_space_usage(String const& path, DuOption const& du_option,
         auto di = Core::DirIterator(path, Core::DirIterator::SkipParentAndBaseDir);
         if (di.has_error()) {
             outln("du: cannot read directory '{}': {}", path, di.error_string());
-            return Error::from_string_literal("An error occurred. See previous error."sv);
+            return Error::from_string_literal("An error occurred. See previous error.");
         }
 
         while (di.has_next()) {

Userland/Utilities/matroska.cpp

@@ -11,7 +11,7 @@ ErrorOr<int> serenity_main(Main::Arguments)
 {
     auto document = Video::MatroskaReader::parse_matroska_from_file("/home/anon/Videos/test-webm.webm");
     if (!document) {
-        return Error::from_string_literal("Failed to parse :("sv);
+        return Error::from_string_literal("Failed to parse :(");
     }
 
     outln("DocType is {}", document->header().doc_type.characters());

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.");
         }
     }
 

Userland/Utilities/strace.cpp

@@ -848,7 +848,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     int status;
     if (g_pid == -1) {
         if (child_argv.is_empty())
-            return Error::from_string_literal("Expected either a pid or some arguments"sv);
+            return Error::from_string_literal("Expected either a pid or some arguments");
 
         auto pid = TRY(Core::System::fork());