Fix the test configuration

[FlorentClarret]

What does this PR do?

The test envs are not defined correctly, so we always test against the same (old) version 10.8.0

Motivation

Noticed this problem QA-ing https://github.com/DataDog/integrations-core/pull/12553

Additional Notes

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] PR title must be written as a CHANGELOG entry (see why)
• [ ] Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• [ ] PR must have changelog/ and integration/ labels attached

[FlorentClarret]

Closing the PR in favor of https://github.com/DataDog/integrations-core/pull/12777 and we will support newer versions with openmetrics v2 (I created a card in our backlog)