[Comments] Any user can create and get comments for a cooperation they are not involved in

**Description:** Any user can create and get comments for a cooperation they are not involved in

**Reproducible:** always.

**Preconditions:**
The user is logged in.

**Steps to reproduce:**
1. Create a comment for a cooperation current user not involved in (niether initiator nor receiver).

**Actual result:**
The comment is created.

**Expected result:**
A forbidden error must appear.