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/components/info_popover.ts

@@ -1,4 +1,4 @@
-import _ from 'lodash';
+import { each } from 'lodash';
 import coreModule from 'app/core/core_module';
 // @ts-ignore
 import Drop from 'tether-drop';
@@ -28,7 +28,7 @@ export function infoPopover() {
         const content = document.createElement('div');
         content.className = 'markdown-html';
 
-        _.each(clone, (node) => {
+        each(clone, (node) => {
           content.appendChild(node);
         });