TraceView: Reworked header (#63105)

* Reworked header

* Remove toggle from merge

* Update test

* Update how span is retrived

* Tests

* Update tests

* Move new trace page header into its own component

* Remove tests already covered in TracePageHeader.test.tsx

* Update findHeaderTags

* Tooltip updates

packages/grafana-data/src/types/featureToggles.gen.ts

@@ -41,6 +41,7 @@ export interface FeatureToggles {
   export?: boolean;
   exploreMixedDatasource?: boolean;
   tracing?: boolean;
+  newTraceView?: boolean;
   correlations?: boolean;
   cloudWatchDynamicLabels?: boolean;
   datasourceQueryMultiStatus?: boolean;