feat: add runner init-container; deprecate --generate-helm-values-file

[noam-codefresh]

What

added an initContainer to the runner, that creates the agent+runtime on the platform side, if there is no agent_codefresh_token available.

Why

will remove the requirement to run codefresh runner init --generate-helm-values-file before installing using helm.

Notes

the user will need to supply their codefresh token, as well as agent + runtime names, and context:

monitor:
  enabled: true

global:
  # codefreshHost: https://g.codefresh.io"
  codefreshToken: <TOKEN>
  accountId: <ACCOUNT_ID> # TODO: remove that
  agentName: some-agent
  runtimeName: some-rt
  context: <KUBE_CONTEXT>

[korenyoni]

LGTM, small nitpick