Merge branch '25106-hide-issue-mr-button-for-not-loggedin' into 'master'

hide new  issue or MR button for not signed users for a group

## What does this MR do?
This MR prevents user creating issues or MR without signing in

## Are there points in the code the reviewer needs to double check?
NR
## Why was this MR needed?
This issue is needed to ensure an user to be logged in before creating an issue or MR
## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [x] All builds are passing
- [x] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #25106

See merge request !7902

app/views/groups/issues.html.haml

@@ -6,8 +6,8 @@
 - if group_issues(@group).exists?
   .top-area
     = render 'shared/issuable/nav', type: :issues
-    .nav-controls
     - if current_user
+      .nav-controls
         = link_to url_for(params.merge(format: :atom, private_token: current_user.private_token)), class: 'btn' do
           = icon('rss')
           %span.icon-label

app/views/groups/merge_requests.html.haml

@@ -2,6 +2,7 @@
 
 .top-area
   = render 'shared/issuable/nav', type: :merge_requests
+  - if current_user
     .nav-controls
       = render 'shared/new_project_item_select', path: 'merge_requests/new', label: "New Merge Request"
 

changelogs/unreleased/25106-hide-issue-mr-button-for-not-loggedin.yml

+---
+title: Prevent user creating issue or MR without signing in for a group
+merge_request: 7902
+author: