Fix QA not running during chart bumps

What does this MR do?

• CHART_VERSION used to be a file, it's now a variable - with this it no longer serves its purpose in our configuration, let's remove it
• We now trigger a QA run for every change made to our CI configuration
  • Since this is where we manage the chart version, this should be a okay change

Addresses: gitlab-com/gl-infra/delivery#1927 (closed)

Author Check-list

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Reviewer Check-list

• Reviewed the diff jobs to confirm changes are as expected
• No changes shown in the diffs not associated with this MR - This may require a rebase or further investigation