test: refactor bats

[stasadev]

The Issue

https://github.com/ddev/ddev-gitlab-ci/actions/runs/21902133823/job/63232866814

not ok 1 See docker version
# (in test file tests/test.bats, line 14)
#   `version=$(echo "$output" | yq .Client.Version)' failed
# Error: bad file '-': yaml: line 2: mapping values are not allowed in this context

How This PR Solves The Issue

I don't understand what's going on here, because bats don't show full output.

This PR refactors Bats to give more reliable output.

Manual Testing Instructions

Automated Testing Overview

Related Issue Link(s)

Release/Deployment Notes