feat(integration): compute services from matrix

[damienwebdev]

PR Checklist

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• The commit message follows our guidelines: https://github.com/mage-os/github-actions/blob/main/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Currently, the integration workflow uses hard-coded services which only happenstance work across the matrix of service versions that we test against.

For example, if between opensearch 1 / 2 / 3, they decided to change the environment variables around (they did):

DISABLE_INSTALL_DEMO_CONFIG: true
DISABLE_SECURITY_PLUGIN: true

Then the integration tests would break for only some versions.

Touches: #338

What is the new behavior?

Instead, we derive the services matrix in supported-version as of #353 and now we use it here.

Does this PR introduce a breaking change?

• Yes
• No

I don't expect this to be breaking. However, if people are using consistent versions.

However, scenarios like: supported-version@1.0.0 with integration@main would break.

The generate-mirror-repo-js depends on this action it should be validated against this PR before merge. I reviewed other dependents:

and the UI is inaccurate the other repos don't use this action.

[rhoerr]

generate-mirror-repo-js should be unaffected. Action references are all @main. Tonight's upstream-nightly run will confirm.

[rhoerr]

Green: https://github.com/mage-os/generate-mirror-repo-js/actions/runs/25472561947