Operator deletes resources when it hits an error.

[b13n1u]

Describe the bug
Operator deleted resources when it hit an error like:

ERROR - [config_dispatcher.py:__dispatch_config_pack:347] (Dispatcher) Failed to execute config ADD_sslvserver_sslcertkey_binding_k8Dus1_crd_Listener_xx.xxx.xxx.xx_443_ssl_cs.corp_xx_2024_true_{certkeyname:cs.corp_xx_2024 ca:false snicert:true vservername:k8Dus1_crd_Listener_xx.xxx.xxx.xx_443_ssl } (Status: 104, ErrorCode: 1674, Reason: Nitro Exception: Duplicate domain cert cannot be added.)
...
2024-04-16 11:35:35,566  - INFO - [config_dispatcher.py:__dispatch_config_pack:355] (Dispatcher) Processing of ConfigPack 'Listener.clusterinfra.customersupportpublic.HTTPRoute_delete_spec' is successful
2024-04-16 11:35:35,891  - INFO - [config_dispatcher.py:__dispatch_config_pack:355] (Dispatcher) Processing of ConfigPack 'Listener.clusterinfra.customersupportpublic.delete_spec' is successful
...
DELETE_sslvserver_sslcertkey_binding_k8Ams2ek_crd_Listener_xx.xxx.xx.xx_443_ssl_extcs_2022_true DELETE_csvserver_responderpolicy_binding_k8Ams2ek_crd_Listener_xx.xxx.x.xx_80_http_k8Ams2_crd_Listener_xx.xxx.xx.xxx_80_http_redirect DELETE_responderpolicy_k8Ams2ek_crd_Listener_xx.xxx.xx.xxx_80_http_redirect DELETE_responderaction_k8Ams2ek_crd_Listener_xx.xxx.xx.xx_80_http_redirect DELETE_csvserver_k8Ams2ek_crd_Listener_xx.xxx.xx.xxx_80_http DELETE_csvserver_k8Ams2ek_crd_Listener_xx.xxx.xx.xxx_443_ssl DELETE_sslprofile_k8Ams2_crd_Listener_
....

after the deletion the operator seemed to not do anything. Only after a restart it figured out that the resources are missing and it added them back again.

It looks like there was a SSL certificate added manually into the netscaler instance and the operator could not handle it.

To Reproduce

1. Replace a certificate manually in netscaler and when operator hits (Status: 104, ErrorCode: 1674, Reason: Nitro Exception: Duplicate domain cert cannot be added.) it will delete listener resources.
2. netscalr Controler version: 1.39.6
3. MPX version: NetScaler NS13.1: Build 42.47.nc
4. --ingress-classes citrix --feature-node-watch false --enable-cnc-pbr false --update-ingress-status yes

Expected behavior
The operator should fail with an exception, stop executing or continue working ignoring the change but NOT delete resources.

Logs

kubectl logs
I can provide more logs if needed but I would need to obfuscate some confidential details.