Dashboard Migrations: V6 pulldowns to annotations; variables (#112221)

* 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

* migrate to v8

* 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

* snapshots

* wip

* fix test

* remove nav when cleaning up defaults

* migrate to v6

* update comments

* 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

* update snapshot

* remove test

---------

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

apps/dashboard/pkg/migration/conversion/conversion_test.go

@@ -305,23 +305,6 @@ func TestConversionMetrics(t *testing.T) {
 			expectedSourceSchema: "v2alpha1",
 			expectedTargetSchema: "v2beta1",
 		},
-		{
-			name: "v0 to v1 conversion with minimum version error (succeeds but marks failed)",
-			source: &dashv0.Dashboard{
-				ObjectMeta: metav1.ObjectMeta{UID: "test-uid-4"},
-				Spec: common.Unstructured{Object: map[string]any{
-					"title":         "old dashboard",
-					"schemaVersion": 5, // Below minimum version (13)
-				}},
-			},
-			target:               &dashv1.Dashboard{},
-			expectAPISuccess:     true, // Conversion succeeds but status indicates failure
-			expectMetricsSuccess: false,
-			expectedSourceAPI:    dashv0.APIVERSION,
-			expectedTargetAPI:    dashv1.APIVERSION,
-			expectedSourceSchema: "5",
-			expectedTargetSchema: fmt.Sprintf("%d", 41), // LATEST_VERSION
-		},
 	}
 
 	for _, tt := range tests {