Feature/issue 11150

[lasote]

Changelog: Feature: Remove the parameter copy_symlink_folders of the conan.tool.files.copy function and now, any symlink file pointing to a folder will be treated as a regular file.
Docs: conan-io/docs#2558

Now, any symlink file pointing to a folder will be treated as a regular file, so they will only be copied if the specified pattern matches with the file. At the destination folder, it will be created pointing to the exact same folder (absolute or relative) being the user's responsibility (if necessary) to make the symlink a relative path before copying it.

Close #11150

[memsharded]

Looking good. The test is broken in 2.7: from pathlib import Path