🎯 MVC 3 follow-up: Change "Opened" to "Created" within Issues, Epics, and MRs

Proposal

This issue is a follow up of #246959 (closed)

• Scope: MVC 3 - files identified in #246959 (comment 527962323)
• Address any files that still need to be updated (below)

From @msedlakjakubowski : Some files that I haven't modified in !56391 (merged) because I don't know what they do:

• app/assets/javascripts/cycle_analytics/components/stage_code_component.vue#L42
• app/assets/javascripts/cycle_analytics/components/stage_component.vue#L42
• app/assets/javascripts/cycle_analytics/components/stage_review_component.vue#L44
• ee/app/assets/javascripts/analytics/code_review_analytics/components/merge_request_table.vue#L28
• ee/app/assets/javascripts/analytics/cycle_analytics/components/stage_event_item.vue#L57
• ee/app/assets/javascripts/issues_analytics/components/issues_analytics.vue (lines 55, 181, and 187)
• ee/app/assets/javascripts/issues_analytics/components/issues_analytics_table.vue#L95
• ee/app/assets/javascripts/related_items_tree/components/tree_item_body.vue#L79

I've tried changing these two, but I couldn't see where the change was:

• app/assets/javascripts/issuable_list/constants.js#L14
• app/assets/javascripts/issuable_show/components/issuable_header.vue#L87

All the above changes: created-various.patch

Insight

Users are confused by our use of Opened ## minutes ago in list views. They assume this indicates when the item was literally "opened up"/visited by another teammate or perhaps updated- and not that this is when the item was created.

Supporting evidence

Interview participant: "This is when the issue was last opened or edited"

Dovetail insight link : https://dovetailapp.com/projects/386754d7-5187-4fe1-8a8d-7f1c3e5d4e2f/insights/present/d1c03566-da2c-4548-93b0-0f41d6d419da

Action

Change instances of Opened in lists to Created within Epics, Issues, and Merge Requests.

In a list	Within an item

Resources

• 🕊 Dovetail project
• 🔍 Research issue

Tasks

• Assign this issue to the appropriate Product Manager, Product Designer, or UX Researcher.
• Add the appropriate Group (such as ~"group::source code") label to the issue. This helps identify and track actionable insights at the group level.
• Link this issue back to the original research issue in the GitLab UX Research project and the Dovetail project.