message: Allow to load extensions through compiler variable definitions
diff: -#include "catch.hpp"
  -
  #include "sqllogic_test_runner.hpp"
  -#include "test_helpers.hpp"
  +
  +#include "catch.hpp"
  #include "duckdb/main/extension_helper.hpp"
  #include "sqllogic_parser.hpp"
  -#include "test_helpers.hpp"
  +#ifdef OUT_OF_TREE
  +#include EXTENSION_HEADER
  +#endif
  #include "test_helper_extension.hpp"
  namespace duckdb {
  @@ -196,6 +197,10 @@ void SQLLogicTestRunner::ExecuteFile(string script) {
  FAIL("Could not find test script '" + script + "'. Perhaps run `make sqlite`. ");
  }
  +#ifdef OUT_OF_TREE
  + db->LoadExtension<duckdb::EXTENSION_CLASS>();
  +#endif
  +
  /* Loop over all records in the file */
  while (parser.NextStatement()) {
  // tokenize the current line
  