* StateTimeline: E2E tests for basic rendering, no data, and tooltip interactions
* Add tests for StateTimelineTooltip sub-component
* Remove unused import from state-timeline.spec.ts
* updates from PR review
* NewGauge: Fix segmented gauge with min value != 0
* update gdev dashboard to exercise case
* update gdev dashboard with panel to exercise
* update
---------
Co-authored-by: Paul Marbach <paul.marbach@grafana.com>
* migrate to v19
* migrate to v18
* Migration to be verified: v17 Convert minSpan to maxPerRow in panels
* Migration to be verified: 16 Grid layout migration
* Refactor v17 and v19 migrations to use shared helper functions
* Migration to be verified: 15 No-op migration for schema consistency
* Migration to be verified: 14 Shared crosshair to graph tooltip migration
* cleanup
* wip
* complete migration
* fix lint issues
* refactor and test with minimal graph config
* update tests
* extract defaults outside the func
* lint
* lint
* add missing showValues prop
* add context and fix latest version
* generate snapshots
* v13 should be no-op
* clean up
* remove v28
* remove singlestat migraiton from frontend migrator because this is an automigration
* remove unused function
* Remove v24 table plugin logic
* cleanup
* remove plugin version for automigrate as it was used only in v24 and v28 that have been removed
* cleanup
---------
Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>