Common data for test functions and test classes
Finds all test cases (functions, classes, built-in unittest blocks) Template parameters are module strings
Finds all test cases (functions, classes, built-in unittest blocks) Template parameters are module symbols
Finds all test classes (classes implementing a test() function) in the given module
Finds all test functions in the given module. Returns an array of TestData structs
Finds all built-in unittest blocks in the given module. Recurses into structs, classes, and unions of the module.