OPSEXP-3298 Workaround the downloaded artifacts cache invalidation

[gionn]

build where failing more often than usual and realized the cache was outdated

OPSEXP-3298

[Copilot]

Pull Request Overview

This PR updates the composite action to invalidate the downloaded artifacts cache whenever the ActiveMQ or Tomcat versions change.

• Peeks activemq_version and tomcat_version from their role defaults
• Updates the cache key to include those version values
• Removes the previous group_vars/all.yml hash and keeps the prefetch-artifacts hash

Comments suppressed due to low confidence (3)

.github/actions/cache-downloads/action.yml:18

• The yq command may include quotes in its output which can result in quotes being embedded in the cache key. Consider using yq with the -r flag (e.g., yq -r '.activemq_version' ...) to produce raw, unquoted values.

        echo "activemq_version=$(yq '.activemq_version' roles/activemq/defaults/main.yml)" >> $GITHUB_OUTPUT

.github/actions/cache-downloads/action.yml:33

• The indentation before "mq" will be included in the cache key string due to the backslash continuation, introducing unintended leading spaces. Remove the extra whitespace or align the backslashes without indentation.

          mq${{ steps.activemq_peek.outputs.activemq_version }}-\

.github/actions/cache-downloads/action.yml:32

• [nitpick] Splitting the cache key string with backslash escapes is harder to read and maintain. Consider using YAML’s folded block scalar (>-) or a single-line string for improved clarity.

        key: "cache-downloads-v${{ inputs.cache-version }}-${{ inputs.cache-name }}-\