Remove cmake `PROPERTIES CXX_VISIBILITY_PRESET "hidden"`#4072

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rwgk wants to merge 1 commit intopybind:masterfrom

rwgk:master_no_fvisibility_hidden

Commits on Jul 16, 2022

Remove cmake `PROPERTIES CXX_VISIBILITY_PRESET "hidden"`, add `PYBIND11_NS_VISIBILITY`, use to resolve all "... declared with greater visibility than ..." warnings across all platforms.
rwgk
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