find_package: Improve --debug-find-pkg= when using a find module

Extend the feature added by commit d7b18895bc (cmake: Add filtered
debug-find options, 2021-12-07, v3.23.0-rc1~217^2) to enable debug
output for `find_*` calls within a find module or cmake package
configuration file.

Fixes: #23211
9 files changed