This changes the `ListBase` argument for certain motion path functions
to `Vector<MPathTarget *>`. (and `Span`)
To better describe what the function is doing,
`animviz_get_object_motionpaths` has been renamed
to `animviz_build_motionpath_targets`.
Since `BLI_freelistN` can no longer be used, I added
`animviz_free_motionpath_targets`.
Note that the Vector is of `MPathTarget *` which
are allocated the C way. Because the `MPathTarget` struct is defined
in the .cc file, that's the only way for it to work atm.
Other refactors may mitigate that in the future, but I wanted to keep
the scope small.
Pull Request: https://projects.blender.org/blender/blender/pulls/133212
e4f34453e3