Dashboard Migrations: V9 - singlestat panel thresholds (#111422)

* 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

* migrate to v12

* extract defaults outside the func

* lint

* lint

* add missing showValues prop

* migrate to v11

* migrate to v10

* add test files

* update

* migrate to v9

* add context and fix latest version

* add context

* add context

* generate snapshots

* v13 should be no-op

* clean up

* fix tests

* add context

* snapshots

* generate snapshots

* update

* fix test

* 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

* update snapshot

* update snapshot

* update snapshot

---------

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

apps/dashboard/pkg/migration/schemaversion/migrations.go

@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	MIN_VERSION    = 9
+	MIN_VERSION    = 8
 	LATEST_VERSION = 42
 )
 
@@ -35,6 +35,7 @@ type PanelPluginInfo struct {
 
 func GetMigrations(dsInfoProvider DataSourceInfoProvider) map[int]SchemaVersionMigrationFunc {
 	return map[int]SchemaVersionMigrationFunc{
+		9:  V9,
 		10: V10,
 		11: V11,
 		12: V12,