Performance: Standardize lodash imports to use destructured members (#33040)

* Performance: Standardize lodash imports to use destructured members
Changes lodash imports of the form `import x from 'lodash/x'` to
`import { x } from 'lodash'` to reduce bundle size.

* Remove unnecessary _ import from Graph component

* Enforce lodash import style

* Fix remaining lodash imports

public/app/core/utils/explore.ts

@@ -1,5 +1,5 @@
 // Libraries
-import _ from 'lodash';
+import { flatten, omit, uniq } from 'lodash';
 import { Unsubscribable } from 'rxjs';
 // Services & Utils
 import {
@@ -72,7 +72,7 @@ export async function getExploreUrl(args: GetExploreUrlArguments): Promise<strin
   /** In Explore, we don't have legend formatter and we don't want to keep
    * legend formatting as we can't change it
    */
-  let exploreTargets: DataQuery[] = panelTargets.map((t) => _.omit(t, 'legendFormat'));
+  let exploreTargets: DataQuery[] = panelTargets.map((t) => omit(t, 'legendFormat'));
   let url: string | undefined;
 
   // Mixed datasources need to choose only one datasource
@@ -441,7 +441,7 @@ export const getRefIds = (value: any): string[] => {
     refIds.push(getRefIds(value[key]));
   }
 
-  return _.uniq(_.flatten(refIds));
+  return uniq(flatten(refIds));
 };
 
 export const refreshIntervalToSortOrder = (refreshInterval?: string) =>