[Nuctl][Dashboard] Move autofix functionality to platform side

[rokatyy]

jira - https://jira.iguazeng.com/browse/NUC-127

This pull request moves the autofix functionality to the platform side to achieve the following:

1. Avoid going through the entire import flow twice.
2. Allow passing 'autofix' as a header within the API request, enabling users to import with the autofix option from the UI.
3. Consolidate validation and autofix functionality in one place, but still following single responsibility principle and not touching validation code directly

Currenntly maxRetries is equal to 1, because we support only one error to be autofixed.

[TomerShor]

I am not yet convinced doing the auto-fixing while validating is the right way to do it.
While I understand this saves us another deployment/validation cycle, this pretty much defies the SOLID principle of single responsibility.

Changing the function configuration on-the-fly is very intrusive and can cause some unexpected behaviors from users if not used properly.
We wanted this feature in the upgrade so it wouldn't fail, but generally I prefer that the deployment will fail if the wrong configuration is given.

I lean towards seperating the fixing from nuctl to a "Fixer" kind of object in the functionconfig package, that can be called from the anywhere, but mainly used when importing functions.

[rokatyy]

@TomerShor agreed with those points, let's discuss tomorrow on nuclio sync

[TomerShor]

Last comment from me - looking great

[TomerShor]

LGTM 👌