Perf: don't re-init plots when changing dashboard timeRange (#46339) (#46340)

(cherry picked from commit ec911be8ef)

Co-authored-by: Leon Sorokin <leeoniya@gmail.com>

packages/grafana-data/src/dataframe/frameComparisons.ts

@@ -60,6 +60,9 @@ export function compareDataFrameStructures(a: DataFrame, b: DataFrame, skipConfi
         return false;
       }
 
+      if (key === 'interval') {
+        continue;
+      }
       if (key === 'custom') {
         if (!shallowCompare(cfgA[key], cfgB[key])) {
           return false;