Add scheduler_extra_arguments parameter

[treydock]

Upstream docs: https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/control-plane-flags/#scheduler-flags

Appears valid as far back as docs go that I could find: https://v1-15.docs.kubernetes.io/docs/setup/production-environment/tools/kubeadm/control-plane-flags/#scheduler-flags

One example of how I am going to use this:

kubernetes::scheduler_extra_arguments:
  - 'bind-address: 0.0.0.0'

[puppet-community-rangefinder]

kubernetes::config::kubeadm is a class

that may have no external impact to Forge modules.

kubernetes is a class

Breaking changes to this file MAY impact these 5 modules (near match):

• jetstack-kubernetes_addons
• jetstack-fluent_bit
• jetstack-tarmak
• jetstack-prometheus
• jetstack-calico

This module is declared in 0 of 575 indexed public Puppetfiles.

---

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Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[sanfrancrisko]

Thanks for the enhancement and test coverage for it @treydock