Adds target blank to environment button in terminal view

What does this MR do?

Adds target blank to environment button to allow opening in a new window in order to match the existing ones.

Does this MR meet the acceptance criteria?

• [ ] Changelog entry added, if necessary
• [ ] 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 #29729 (closed)