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/Utilities/fortune.cpp

@@ -27,16 +27,16 @@ public:
             return {};
         auto& entry = value.as_object();
         Quote q;
-        if (!entry.has("quote") || !entry.has("author") || !entry.has("utc_time") || !entry.has("url"))
+        if (!entry.has("quote"sv) || !entry.has("author"sv) || !entry.has("utc_time"sv) || !entry.has("url"sv))
             return {};
         // From here on, trust that it's probably fine.
-        q.m_quote = entry.get("quote").as_string();
-        q.m_author = entry.get("author").as_string();
+        q.m_quote = entry.get("quote"sv).as_string();
+        q.m_author = entry.get("author"sv).as_string();
         // It is sometimes parsed as u32, sometimes as u64, depending on how large the number is.
-        q.m_utc_time = entry.get("utc_time").to_number<u64>();
-        q.m_url = entry.get("url").as_string();
-        if (entry.has("context"))
-            q.m_context = entry.get("context").as_string();
+        q.m_utc_time = entry.get("utc_time"sv).to_number<u64>();
+        q.m_url = entry.get("url"sv).as_string();
+        if (entry.has("context"sv))
+            q.m_context = entry.get("context"sv).as_string();
 
         return q;
     }