Feat: Update Session Header with Overview (Side Panel)

What does this MR do and why?

This change updates the Side Panel view for Sessions for the "Title Overview" area. These things have changed:

• Project is removed from Title spot in Side Panel, instead it is now the Session Title
• Session Title no longer exists as subtitle (see move, above)
• Adds status badge
• Adds Updated timestamp
• Adds Project
• Adds Triggered User (with icon)

This change DOES NOT:

• Fix the padding issue in the Side Panel (will be a follow up MR to keep the file changes separate)
• Add the cancel button or the retry button (cancel button will be in a follow up) --> !251250 (merged)

References

Related GitLab Work Items: #618767 (closed) (Child), #609573 (closed) (Parent)

Screenshots or screen recordings

Before	After

Screen Recording

How to set up and validate locally

For DAP/General Setup

• General DAP: https://docs.gitlab.com/development/duo_agent_platform/
• Assigning Duo to a group: https://docs.gitlab.com/development/ai_features/#run-gitlabduosetup-script
• Make sure you are in SaaS mode with export GITLAB_SIMULATE_SAAS=1 set in your env.runit file in your local gdk.
• Turn on the following feature flags (if necessary): duo_workflow, duo_workflow_in_ci, ai_flow_triggers.

Adding Sessions

1. A: If you see no Sessions, you can trigger one that displays a Pipeline/Job by going to an Issue within your Duo enabled project and clicking the Generate MR with Duo button. It should trigger a new session that you can open up.
2. B: You can also run the following query bundle exec rake "gitlab:duo_workflow:populate[50,20,1,<<YOUR_TEST_GROUP_PATH_HERE>>]" to create new agent sessions. Refresh the page. Make sure the group you are testing in has Duo assigned (see DAP setup above).

Test Session Details (The Actual Testing)

1. Make sure you are in a Duo enabled projects where Sessions permissions have been set.

Test Details Header

1. Go to the Side Panel on the right and open the Sessions tab (the double square icon)
2. Click any Session or trigger a new one.
3. View the Session Details Header changes (see notes in changes above and listed Work Items for Screens)

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #618767 (closed)