Revert "ci: pin baremetal with jdk17 (#2990)"

[v1v]

This reverts commit da39b42.

[apmmachine]

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• Start Time: 2023-02-08T15:09:25.841+0000

• Duration: 59 min 29 sec

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Test	Results
Failed	0
Passed	3518
Skipped	121
Total	3639

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To re-run your PR in the CI, just comment with:

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• run elasticsearch-ci/docs : Re-trigger the docs validation. (use unformatted text in the comment!)