wrap AnaToolHandle around AsgToolConfig

The basic reasoning here is that AnaToolHandle is essentially the out-dated and discouraged mechanism for creating tools, and has been replaced with AsgToolConfig for quite a while (or alternatively indirectly via AnaAlgorithmConfig).

I did have to disable some Athena tests for setting sub-tools in Athena. There are already some of those disabled, and the basic logic is that since this is the legacy way of doing things, unless this breaks existing code (as verified by CI tests) I no longer want to support all the possible edge cases in this rather brittle and complex piece of code.