Adding certificate validity duration in Kafka user

[shubhamcoc]

Description

This MR is to add duration in Kafka user spec. It allows user to specify validity time for certificate created by cert manager.
It helps the user to create user certificate for longer duration than the default value of cert manager. #964

Type of Change

• New Feature

Checklist

• I have read the contributing guidelines
• Existing issues have been referenced (where applicable)
• All code style checks pass
• New code contribution is covered by automated tests
• All new and existing tests pass

[bartam1]

We also have to use the validation duration for the k8s CSR object:

koperator/pkg/pki/k8scsrpki/k8scsr_user.go

Line 253 in a64633a

Request: csr,

[shubhamcoc]

We also have to use the validation duration for the k8s CSR object:

koperator/pkg/pki/k8scsrpki/k8scsr_user.go

Line 253 in a64633a

Request: csr,

Yes one validation is required as we have 2 different combination available. One for cert-manager with 1 hour as minimum duration and another with k8s CSR object with 10 mins as minimum duration.

[panyuenlau]

Can we also extend the existing tests to include the change in this PR?

koperator/pkg/pki/certmanagerpki/certmanager_user_test.go

Line 66 in ffb1fab

func TestReconcileUserCertificate(t *testing.T) {

koperator/pkg/pki/k8scsrpki/k8scsr_user_test.go

Line 91 in ffb1fab

func TestReconcileUserCertificate(t *testing.T) {

[panyuenlau]

Note: these two lines are not related to the PR and they are copied from #974 to make linter not complain the missing case in the switch statement.

[shubhamcoc]

Can we also extend the existing tests to include the change in this PR?

koperator/pkg/pki/certmanagerpki/certmanager_user_test.go

Line 66 in ffb1fab

func TestReconcileUserCertificate(t *testing.T) {

koperator/pkg/pki/k8scsrpki/k8scsr_user_test.go

Line 91 in ffb1fab

func TestReconcileUserCertificate(t *testing.T) {

Added it. Kindly review it