feat: add kubernetes autodiscovery

[olblak]

Add an Autodiscovery plugin to automate container update in Kubernetes manifest update.
By default this plugin will automatically add digest such as

TARGETS
========

dotnet
------

**Dry Run enabled**

⚠ - change detected:
	* key "$.spec.containers[1].image" should be updated from "\"mcr.microsoft.com/dotnet/framework/sdk:3.5\"" to "mcr.microsoft.com/dotnet/framework/sdk:3.5@sha256:2dce56dc4d638ee804a4ee0321617c64b7e127653c5c71dbbcad5c31753eacaf", in file "PodTemplates.d/package-windows.yaml"

Test

To test this pull request, you can run the following commands:

cd cd pkg/plugins/autodiscovery/kubernetes/
go test

Additional Information

Tradeoff

Potential improvement

Compared to other autodiscovery plugin handling containers, this one add additionnal behavior that would be nice for the plugin dockerfile, docker-compose, and helm

1. Add digest to tag by default
2. Update digest when using the format mcr.microsoft.com/dotnet/framework/sdk:3.5@sha256:2dce56dc4d638ee804a4ee0321617c64b7e127653c5c71dbbcad5c31753eacaf