Discuss future approach for cpp_info.names and cpp_info.filenames

[memsharded]

Coming from #8568:

• The cpp_info.names["cmake_find_package_multi"] strategy for custom generators behaviors seem too specific
• Consider using something more generic like cmake (when this doesn't break for current cmake generator)
• Or a conceptual name: cmake_targets_names, that could be exploited by different generators

[memsharded]

Related #7661

[lasote]

Note: It is not strictly related to this issue but as an observation, for the CMakeDeps only the cpp_info.filenames field affects to the name of the xxx-config.cmake file, it doesn't default to the self.cpp_info.names like the older generators.

[memsharded]

Closed by #8727