Support setting dnsPolicy and dnsConfig in Profiles

[welteki]

Description

Update types, clientset and CRDs to support setting dnsPolicy and dnsConfig for functions using Profiles.

Why is this needed?

• I have raised an issue to propose this change (required)

Support custom DNS configurations for functions as discussed in:
https://github.com/openfaas/customers/discussions/73

Who is this for?

What company is this for? Are you listed in the ADOPTERS.md file?

How Has This Been Tested?

New types where used in the pro fork of faas-netes where the support for Profiles is implemented.

Changes for the OpenFaaS chart were verified while testing this feature with faas-netes pro.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Upgrading an OpenFaaS cluster

The Profiles CRD is managed managed by the chart as a template. The latest version will be applied automatically by Helm.

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s
• I have added tests to cover my changes.
• All new and existing tests passed.

[alexellis]

Approved