Remove a katib-webhook-cert Secret from components

[tenzen-y]

What this PR does / why we need it:
I removed a katib-webhook-cert Secret from the components directory to avoid startup issues in the cert-manager installation.

Need katib-webhook-cert

• katib-external-db
• katib-leader-election
• katib-standalone
• katib-standalone-postgres

NOT to need katib-webhook-cert

• katib-cert-manager
• katib-openshift
• katib-with-kubeflow

Also, I confirmed built manifests like this:

$ kustomize build manifests/v1beta1/installs/katib-cert-manager/ | grep -C2 "name: katib-webhook-cert"
kind: Certificate
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
spec:
$ kustomize build manifests/v1beta1/installs/katib-external-db/ | grep -C2 "name: katib-webhook-cert"
kind: Secret
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
---
$ kustomize build manifests/v1beta1/installs/katib-leader-election/ | grep -C2 "name: katib-webhook-cert"
kind: Secret
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
---
$ kustomize build manifests/v1beta1/installs/katib-openshift/ | grep -C2 "name: katib-webhook-cert"
    prometheus.io/scheme: http
    prometheus.io/scrape: "true"
    service.beta.openshift.io/serving-cert-secret-name: katib-webhook-cert
  labels:
    katib.kubeflow.org/component: controller
$ kustomize build manifests/v1beta1/installs/katib-standalone/ | grep -C2 "name: katib-webhook-cert"
kind: Secret
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
---
$ kustomize build manifests/v1beta1/installs/katib-standalone-postgres/ | grep -C2 "name: katib-webhook-cert"
kind: Secret
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
---
$ kustomize build manifests/v1beta1/installs/katib-with-kubeflow/ | grep -C2 "name: katib-webhook-cert"
kind: Certificate
metadata:
  name: katib-webhook-cert
  namespace: kubeflow
spec:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Checklist:

• Docs included if any changes are user facing

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tenzen-y

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [tenzen-y]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[andreyvelich]

I think, we can simplify this as follows in the Kustomization file:

secretGenerator:
  - name: katib-webhook-cert
    options:
      disableNameSuffixHash: true

WDYT @tenzen-y ?

[tenzen-y]

It's a good point! Thanks!

[tenzen-y]

Done.

[andreyvelich]

Thank you for the update @tenzen-y!
/lgtm

[google-oss-prow]

New changes are detected. LGTM label has been removed.

[andreyvelich]

/lgtm