fix(ag-grid): Change how the license key is set (#1218)

- We were breaking webpack builds with the `const { env } = import.meta`
call
- Use `import.meta.env?.` directly
- Tested using a webpack project importing the plugin

Author: mofojed

plugins/ag-grid/src/js/src/AgGridPlugin.ts

@@ -4,14 +4,9 @@ import type { dh } from '@deephaven/jsapi-types';
 import { LicenseManager } from '@ag-grid-enterprise/core';
 import { AgGridWidget } from './AgGridWidget';
 
-try {
-  const { env } = import.meta;
-  const key = env?.VITE_AG_GRID_LICENSE_KEY ?? '';
-  if (key != null && key !== '') {
-    LicenseManager.setLicenseKey(key);
-  }
-} catch (error) {
-  // We can just ignore this error if the license key is not set or invalid. AG Grid will log an error, and consumers should be adding their own license key.
+const key = import.meta.env?.VITE_AG_GRID_LICENSE_KEY ?? '';
+if (key != null && key !== '') {
+  LicenseManager.setLicenseKey(key);
 }
 
 export const AgGridPlugin: WidgetPlugin<dh.Widget> = {