make tls configuration configurable via flags

[cirocosta]

Description of problem

We've seen cases where folks need to have a couple properties

• CipherSuites
• TLSMinVersion
• others? (cc @xyloman)

Proposed solution

have a set of flags for the properties that we want to customize such that in the Kubernetes Deployment object we're able to customize it if necessary, e.g.

kind: Deployment
...
     args:
         --tls-min-version=...

Acceptance criteria

• package-for-cartographer needs to configure these for tap
• also should be tested in p4c

[squeedee]

Would be nice to provide a command line flags helper and SetupWithManager helper for webhooks to make this re-usable by other teams

[scothis]

Is this something that needs to be configurable, or configured once? The only client for the webhook is the k8s api server, so as long as that client is compatible, we should be ok to configure it once for all installs.

[squeedee]

@scothis it needs to be configurable. Some people need to be able to downgrade supported versions and ciphers, for example.