feat(trigger): enhance trigger subscription management and cache handling

- Added `name` parameter to `TriggerSubscriptionBuilderCreateApi` for better subscription identification.
- Implemented `delete_cache_for_subscription` function to clear cache associated with trigger subscriptions.
- Updated `WorkflowPluginTriggerService` to check for existing subscriptions before creating new plugin triggers, improving error handling.
- Refactored `TriggerProviderService` to utilize the new cache deletion method during provider deletion.

This improves the overall management of trigger subscriptions and enhances cache efficiency.

api/core/trigger/utils/encryption.py

@@ -65,6 +65,13 @@ def create_trigger_provider_encrypter_for_subscription(
     )
     return encrypter, cache
 
+def delete_cache_for_subscription(tenant_id: str, provider_id: str, subscription_id: str):
+    cache = TriggerProviderCredentialsCache(
+        tenant_id=tenant_id,
+        provider_id=provider_id,
+        credential_id=subscription_id,
+    )
+    cache.delete()
 
 def create_trigger_provider_encrypter_for_properties(
     tenant_id: str,