Add acceptance tests for copying file over folder and vice versa

[phil-davis]

https://github.com/owncloud/core/blob/master/tests/acceptance/features/apiWebdavProperties1/copyFile.feature has scenarios that copy a file to another file, and scenarios where the copy overwrites an existing file.

Add scenarios to cover combinations of:

• copy a file over the top of an existing folder [Tests-Only]Add acceptance tests to copy files over folder and vice versa #37701
• copy a folder over the top of an existing file [Tests-Only]Add acceptance tests to copy files over folder and vice versa #37701
• copy between different folders at different levels in the user's file system view [Tests-Only]Add acceptance tests to copy files over folder and vice versa #37701
• do these copy operations in a received user/group share

Note: PR #37660 is adding these type of copy-overwrite tests for public links.