feat(editor): Show template credential setup based on feature flag (#7989)

Replace the local storage based feature flag with posthog feature flag.

Also:
- Fix bunch of eslint warnings in posthog store

cypress/support/index.ts

@@ -41,6 +41,13 @@ declare global {
 			draganddrop(draggableSelector: string, droppableSelector: string): void;
 			push(type: string, data: unknown): void;
 			shouldNotHaveConsoleErrors(): void;
+			window(): Chainable<
+				AUTWindow & {
+					featureFlags: {
+						override: (feature: string, value: any) => void;
+					};
+				}
+			>;
 		}
 	}
 }