[bug] tool.collect_libs behaves differently on mac and linux

[DS-Serafin]

Mac and Linux both creaete symlinks without package version and libs with package version.

Linux: libmylib.so -> llibmylib.so.X.Y.Z
Mac: libmylib.dylib -> llibmylib.X.Y.Z.dylib

tools.collect_libs with make a os.path.splitext and check if the extension is a valid lib extension. Both symlinks are fine:
libmylib.so -> ext = .so (valid and listed)
libmylib.dylib -> ext = .dylib (valid and listed)

The actualy libs however behave defferntly:
libmylib.so.X.Y.Z -> ext = .Z (not valid is discarded
libmylib.X.Y.Z.dylib -> ext = .dylib (valid and listed)

Not sure what the corect behaviour should be probaly both should be listed in both cases. But behaving like this is clearly a bug

[gabyx]

Jeah, collect_lib should collect all libs (even symlinks) and also it should report
a list of (fileName, path) instead of only the filenames, to allow the user to check other stuff on these files... discarding symlinks.

On linux the additional check:

".so." in name

should be done...

[SpaceIm]

#11527 implements a consistent behavior. But it keeps only the most generic lib name since collect_libs usually aims to populate self.cpp_info.libs in package_info().