Upgrade default version of kind and kubectl

[essobedo]

fixes tests broken by #10

Motivation

Many tests are failing on MacOS because they test against very old versions of kind that don't work properly on MacOS, thus we can benefit from this problem to upgrade the default version of kind to a more recent version.

Modifications

• Upgrade the default version of kind to v0.17.0
• Upgrade the default version of kubectl to v1.26.1
• Test against the latest versions of kind, kubectl and knative
• Ensure that the tests are launched for PRs
• Install the latest version of the tool yq to make that we have the same version on both OS and thus the same arguments
• Avoid using the syntax ${INPUT_REGISTRY,,} for lowercase as it is only supported on bash 4 and MacOS still uses v3
• Install docker when needed thanks to a dedicated bash function
• Re-use the tee to update the file /etc/hosts since the workaround doesn't work properly and adapt it for both OS

[essobedo]

@lburgazzoli @squakez If you can review it, it would great thx in advance 🙏

[squakez]

LGTM. I just wonder why we need to install docker as it was working before without installing it, right?

[essobedo]

LGTM. I just wonder why we need to install docker as it was working before without installing it, right?

Yes, it is needed, docker is not installed by default on MacOS runners due to a License issue but it is installed on Linux runners.

[essobedo]

@squakez If it is ok for you, would you mind merging it?

[essobedo]

@squakez thank you 👍