update issue count when closing/reopening an issue

What does this MR do?

add or subtract 1 from Issue count when closing/reopening on Issue page

Are there points in the code the reviewer needs to double check?

• No validation of the new total - could break horribly if issues count is updated from elsewhere

Why was this MR needed?

bugfix

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #27452 (closed)