Improve the display of test messages in the editor, especially when there's lots of noise testing: try out new 'badges' UI for test failures #233137

Make running tests from the explorer a better experience testing: some refinements to default settings and progress #233453

• migrate testing.openTesting -> testing.automaticallyOpenResults to be more accurate and discoverable
• use a single click action for 'opening' tests in the explorer. This aligns with the file explorer.
• with that, remove the inline "go to test" action (keep in the context menu for tests with children)
• turn off the followRunningTest setting by default, it's noisy and people have raised issues over this
• remove the unused "auto run delay" setting (not used since the testing API was finalized)