refactor(core): Move all base URLs to UrlService (no-changelog) (#8141)

This change kept coming up in #6713, #7773, and #8135. 
So this PR moves the existing code without actually changing anything,
to help get rid of some of the circular dependencies.


## Review / Merge checklist
- [x] PR title and summary are descriptive.

packages/cli/src/WebhookHelpers.ts

@@ -49,7 +49,6 @@ import type {
 	WebhookCORSRequest,
 	WebhookRequest,
 } from '@/Interfaces';
-import * as GenericHelpers from '@/GenericHelpers';
 import * as ResponseHelper from '@/ResponseHelper';
 import * as WorkflowHelpers from '@/WorkflowHelpers';
 import { WorkflowRunner } from '@/WorkflowRunner';
@@ -820,14 +819,3 @@ export async function executeWebhook(
 		return;
 	}
 }
-
-/**
- * Returns the base URL of the webhooks
- */
-export function getWebhookBaseUrl() {
-	let urlBaseWebhook = process.env.WEBHOOK_URL ?? GenericHelpers.getBaseUrl();
-	if (!urlBaseWebhook.endsWith('/')) {
-		urlBaseWebhook += '/';
-	}
-	return urlBaseWebhook;
-}