[wip] add annotation for CL target

[SylvainJuge]

Relates to #18824

• adds a new ClassLoadingStrategy annotation for packages and classes
• adds ClassLoadingTarget enum to indicate where a given annotated class/package should be loaded
• adds ClassLoadingTargetUtil utility to parse this information from bytecode, without loading class.

Example usage in #17720

Things to discuss/improve

• using an annotation may require to add an extra dependency, this is the case for all the library components which do not have the expected dependency.
• adding a runtime annotation on class/package could be problematic if the instrumented application attempts to read those class annotations, maybe using a compile-time annotation and store this information elsewhere would avoid such issues.
• reading information from bytecode at runtime likely implies some overhead, given the knowledge about where a class should be loaded is static using a (generated) name-based heuristic may be faster.
• as an alternative, we could introduce a new name-based heuristic in InstrumentationModule, when injecting classes each module class would be tested.