Edited the column header for the environments list from created to updated and a…

What does this MR do?

Edits the column header for the environments list from created to updated and adds "created" column header title to the environment details view

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

Why was this MR needed?

updated was the better wording and "created" was missing in the environments detail view

Screenshots (if relevant)

Environments page

from:

to:

Environments details page

from:

to:

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 #27494 (closed)