[Bug]: certManager: {{ .Values.ingress.certManager }} is invalid ingress field

[cep21]

Is there an existing issue for this?

• [X] I have searched the existing issues

Description

Installing the helm chart fails:

│   Warning  error   3m37s (x7 over 4m32s)  helm-controller  Helm upgrade failed: error validating "": error validating data: [ValidationError(Ingress.spec): unknown field "certManager" in io.k8s.api.networking.v1.IngressSpec, ValidationError(Ingress.spec): unknown field "clas │
│ sName" in io.k8s.api.networking.v1.IngressSpec]                                                                                                                                                                                                                                     ```

I think certManager isn't a valid field and it's 'ingressClassName'

See broken PR https://github.com/appsmithorg/appsmith/pull/18266/files

### Steps To Reproduce

Install latest helm chart on version 1.23 of kub

### Public Sample App

_No response_

### Issue video log

_No response_

### Version

latest