Use Cert Manager for Certificate Generation

[tannerrs]

Which chart:
Portal and Gateway

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
A line that is something like "certManager: true" in the chart

If true, there can be a specific secret name in the tls section that uses the cert-manager output. Additionally, the service should generate all certs using cert-manager if certManager is true and useSignedCertificates is set to false for all self-signed. You could add additional capabilities to add things where the deployer creates their own issuer (cluster or namespace scoped) that the chart uses to create any certs. The internal vs external should continue to be separated based on that as well

Describe alternatives you've considered
Alternative is manual process like today

Additional context
None other than cert-manager is becoming a highly used option.