Upgrade Kubernetes to version 1.26.2

[astefanutti]

This PR upgrades Kubernetes dependencies to v1.26.2.

This also upgrades Go to version 1.19, as it's required by Kubernetes v1.26.

Fixes #524.

[z103cb]

/LGTM

[z103cb]

@astefanutti we need to upgrade the kind images to match the k8s version. The version to use would be for 1.25:

kindest/node:v1.25.11@sha256:227fa11ce74ea76a0474eeefb84cb75d8dad1b08638371ecf0e86259b35be0c8

For other versions consult this page: https://github.com/kubernetes-sigs/kind/releases

The configuration file is in: hack/e2e-kind-config.yaml.

It is LGTM otherwise.

[asm582]

Thanks @astefanutti , will this upgrade break InstaScale integration?

[astefanutti]

@z103cb KinD upgrade done in c461f11.

[astefanutti]

Thanks @astefanutti , will this upgrade break InstaScale integration?

@asm582 I don't think so as this PR does not touch the AppWrapper API.

[astefanutti]

/hold

There is a CodeFlare release going on. This PR should be merged once the release is done.

[openshift-ci]

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[z103cb]

/LGTM

[astefanutti]

/unhold