[CI] Drop EOL Rubies

[dafyddcrosby]

Description

Briefly describe the new feature or fix here

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Maintainers

Please ensure that you check for:

• If this change impacts git cache validity, it bumps the git cache
  serial number
• If this change impacts compatibility with omnibus-software, the
  corresponding change is reviewed and there is a release plan
• If this change impacts compatibility with the omnibus cookbook, the
  corresponding change is reviewed and there is a release plan

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud