Hide internal comments from all non-project/group members
#### Issue
Internal comments are [currently visible to epic/issue authors](https://docs.gitlab.com/ee/user/discussions/#add-an-internal-note), even if they're not a member of the project/group. This is confusing and slightly misleading as the term `internal` makes it seem as if the comments are visible only to internal members.
Relevant slack thread: https://gitlab.slack.com/archives/C03MSG8B7/p1665414459963309
#### Proposal
Hide internal comments from all non-project/group members
issue