revert(frontend): put back process.env for jest

public/app/features/plugins/sandbox/sandbox_plugin_loader.ts

@@ -21,7 +21,7 @@ import { CompartmentDependencyModule, PluginFactoryFunction, SandboxEnvironment,
 import { logError, logInfo } from './utils';
 
 // Loads near membrane custom formatter for near membrane proxy objects.
-if (import.meta.env.MODE !== 'production') {
+if (process.env.NODE_ENV !== 'production') {
   // @ts-ignore - this is aliased in vite config but ts complains because it cannot resolve it.
   import('@locker/near-membrane-dom/custom-devtools-formatter');
 }

public/app/store/configureStore.ts

@@ -43,7 +43,7 @@ export function configureStore(initialState?: Partial<StoreState>) {
         iamApi.middleware,
         ...extraMiddleware
       ),
-    devTools: import.meta.env.MODE !== 'production',
+    devTools: process.env.NODE_ENV !== 'production',
     preloadedState: {
       navIndex: buildInitialState(),
       ...initialState,