sql: Work around Clang 17/18 run-time call to consteval function

There was an issue with Clang that causes `consteval` function calls
from default initializers of fields to be made at run-time. This
manifested itself in the case of `ByteString::formatted` as an undefined
reference to `check_format_parameter_consistency` once format string
checking was enabled for Clang builds. The workaround is simple (just
move it to the member initializer list), and unblocks a useful change.

Userland/Utilities/sql.cpp

@@ -26,7 +26,8 @@
 class SQLRepl {
 public:
     explicit SQLRepl(Core::EventLoop& loop, ByteString const& database_name, NonnullRefPtr<SQL::SQLClient> sql_client)
-        : m_sql_client(move(sql_client))
+        : m_history_path(ByteString::formatted("{}/.sql-history", Core::StandardPaths::home_directory()))
+        , m_sql_client(move(sql_client))
         , m_loop(loop)
     {
         m_editor = Line::Editor::construct();
@@ -147,7 +148,7 @@ public:
     }
 
 private:
-    ByteString m_history_path { ByteString::formatted("{}/.sql-history", Core::StandardPaths::home_directory()) };
+    ByteString m_history_path;
     RefPtr<Line::Editor> m_editor { nullptr };
     int m_repl_line_level { 0 };
     bool m_keep_running { true };