Help: Clarify behavior of search ignore-related variables
Not all the behaviors of CMake variables for ignoring search locations by find_...() commands were fully documented. Add the missing effects, clarify the wording and restructure the way the details are assembled to reduce duplication.
Also improve the cross-referencing to ensure all the related variables are more discoverable.
Issue: #20878 (closed)
Backport: release
Edited by Craig Scott