Temporarily remove 7.17.X from the upgrade version list until integration tests are stable again

[pchila]

What does this PR do?

Temporarily remove 7.17 versions from elastic-agent integration tests until tests are green again

Why is it important?

To allow #5379 to be merged in a timely manner

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in ./changelog/fragments using the changelog tool
• I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

Related issues

Questions to ask yourself

• How are we going to support this in production?
• How are we going to measure its adoption?
• How are we going to debug this?
• What are the metrics I should take care of?
• ...

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)

[cmacknz]

Once this merges, create a PR reverting it since 8.15.2-SNAPSHOT existing should fix it and/or the 7.17 fix will fix it for 7.17.24-SNAPSHOT.

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[ycombinator]

Serverless integration tests are failing on TestLogIngestionFleetManaged/Monitoring_logs_are_shipped. I just reopened #3741 to try and fix it again.

[ycombinator]

Integration tests are failing on TestDebLogIngestFleetManaged/Monitoring_logs_are_shipped.

[ycombinator]

[EDIT] Neither failure is related to the changes in this PR and they are also failing on the 8.15 branch right now. We need this PR to be merged to unblock the 8.15.1 so I'm going to force merge this PR.

[pchila]

Once this merges, create a PR reverting it since 8.15.2-SNAPSHOT existing should fix it and/or the 7.17 fix will fix it for 7.17.24-SNAPSHOT.

Revert PR is #5471