- Update the minimum required CMake version to 3.15 for Fwk folders
that might be used as top level projects.
- Remove the minimum required CMake version from projects that is just
included from other top level projects.
Since version 3.19 CMake has been warning that CMake versions below 3.5
is deprecated and support will be removed in the future. This will
silence those warning.
By removing the minimum required version check from projects that is not
intended as top level projects we avoid redundant checks and simplifies
future maintenance.
Closes#10957
