feat: Allow cert-manager certs to be issued by a cluster issuer

[krmichelos]

Purpose

Cert-manager allows both namespaced issuers and cluster level issuers. Currently the certificate doesn't specify a kind and therefore only uses the default which is a namespaced issuer. For those that use cluster issuers it would be good to let them specify that.

Changes

This change allows the user to choose between having an Issuer and a ClusterIssuer for the certificate. It will still default to Issuer if the user doesn't set the value.

Code Author Checklist

• Bump the chart version (Chart.yaml -> version)
• JSON Schema updated (values.schema.json)
• Update README.md via helm-docs (or make prep)
• Run pre-commit run --all-files via pre-commit (or make prep)
• Update Artifacthub annotation (Chart.yaml -> artifacthub.io/changes, artifacthub.io/images)

[krmichelos]

@estahn I rebased this to get rid of the conflicts

[krmichelos]

@estahn When you get a chance will you take a look at this?

[krmichelos]

@estahn this is a pretty small PR, do you think you can take a look?

[krmichelos]

@estahn let me know if you need anything else from me on this.

[krmichelos]

@estahn this is a pretty small PR, do you think you can take a look?

[estahn]

@krmichelos Should we define a default value to keep it backwards compatible?

Apologies for the late response and thanks for nagging!

[krmichelos]

@krmichelos Should we define a default value to keep it backwards compatible?

Apologies for the late response and thanks for nagging!

Yes, you are correct, I have set the default to be the type Issuer
https://github.com/estahn/charts/pull/158/files#diff-e181fafa40c36212b8d851755d9caac0e4ced282286a50a7d5c586959fdf28d5R114