[media] fixes permissions. Allows media_read to download, renames "Delete" to "Hide".

[racostas]

Brief summary of changes

Allows the media_read permission to actually download (see) the files. The permission in this descriptions stats Media: View/Download Candidate Media Files but was not actually allowing to download (see) the documents.

media_write was substituted by media_read in the corresponding cases.

The permission Media: Edit/Upload/Delete Candidate Media Files is renamed to Media: Edit/Upload/Hide Candidate Media Files since we are not able to Delete files but to Hide they.

• [x] Have you updated related documentation?

Testing instructions (if applicable)

1. Go to the media module with a user having only the media_read permission.
2. You should be now capable of downloading (seeing) the files.
3. As admin go to edit candidate and see the permission Media: Edit/Upload/Delete Candidate Media Files is renamed to Media: Edit/Upload/Hide Candidate Media Files .
4. The rest of the functionalities in the module should be rest unchangeable.

Link(s) to related issue(s)

• Resolves #9162