ci: yq version mismatch between kata-containers and CAA

[mkulke]

for processing versions.yaml files kata uses yq v3 while this project assumes yq v4. the query logic is not compatible between both versions, and thus creates a nuisance if you want to build the project locally and have to switch versions in between.

Options that come to mind:

• downgrade to v3 (probably not ideal for users, but maybe we can run it in docker or make it configurable YQ=~/bin/yq3)
• write a bash helper fn that abstracts over versions (get_version kata.ref) and supports v3 and v4 queries

[mkulke]

fixed by #1819