Unified: Run resource data migrations at startup (#114857)

* chore: uncomment unified migration

* chore: adapt and fix tests

* chore: dynamically bump max conns if needed during migration

* chore: copilot suggestions

* chore: pass ctx in RegisterMigration

* chore: make playlists opt-out and dashboards opt-in

* chore: adjust dashboard test

* chore: disable enable log in test

* chore: address review comments

- do not use pointer config
- add migration registry

* chore: more consistent naming

* chore: fix playlist discovery test

pkg/tests/testinfra/testinfra.go

@@ -362,6 +362,13 @@ func CreateGrafDir(t *testing.T, opts GrafanaOpts) (string, string) {
 	_, err = rbacSect.NewKey("permission_cache", "false")
 	require.NoError(t, err)
 
+	if opts.DisableAuthZClientCache {
+		authzSect, err := cfg.NewSection("authorization")
+		require.NoError(t, err)
+		_, err = authzSect.NewKey("cache_ttl", "0")
+		require.NoError(t, err)
+	}
+
 	analyticsSect, err := cfg.NewSection("analytics")
 	require.NoError(t, err)
 	_, err = analyticsSect.NewKey("intercom_secret", "intercom_secret_at_config")
@@ -547,6 +554,8 @@ func CreateGrafDir(t *testing.T, opts GrafanaOpts) (string, string) {
 			require.NoError(t, err)
 			_, err = section.NewKey("dualWriterMode", fmt.Sprintf("%d", v.DualWriterMode))
 			require.NoError(t, err)
+			_, err = section.NewKey("enableMigration", fmt.Sprintf("%t", v.EnableMigration))
+			require.NoError(t, err)
 		}
 	}
 	if opts.UnifiedStorageEnableSearch {
@@ -670,6 +679,7 @@ type GrafanaOpts struct {
 	DisableDataMigrations                 bool
 	SecretsManagerEnableDBMigrations      bool
 	OpenFeatureAPIEnabled                 bool
+	DisableAuthZClientCache               bool
 
 	// Allow creating grafana dir beforehand
 	Dir     string