E2E Test: Console session tab list

[midleman]

Description

Feature: #6160
Goal: Ensure test coverage for console session tab list view
Designs: Link to Miro

Test Cases

Session Tab List

• Verify the different session states (idle/busy/shutdown/etc) (@dhruvisompura to provide states)
• Verify shutdown behavior
  • when there is only one active console session
  • for more than one active console session
• Verify active session behavior
  • Verify that active session changes for editor, and variables pane
  • Verify changing variables pane session does not change primary active session for console/editor.
  • Verify there is an output channel for the session
• Verify restart session behavior
  • Verify diagnostics (the yellow/red squiggle lines due to syntax errors) are re-triggered on restart of session. (@dhruvisompura is still gathering requirements on this)
• Manual: Verify the tab list is accessible (aria attributes, focus state, and keyboard navigation)

Acceptance Criteria

• Tests are tagged for: @:console, @:win, @:web
• Tests are independent and don't rely on each other
• Tests are reliable and tested for flake (--repeat-each).
• Tests run successfully in CI on Electron, Windows and Chromium.