Fixes #15132: add compile decorator for ibmi ConnTestFn

[sushi30]

Describe your changes:

Fixes #15132

Type of change:

• Bug fix

Checklist:

• I have read the CONTRIBUTING document.
• My PR title is Fixes <issue-number>: <short explanation>
• I have commented on my code, particularly in hard-to-understand areas.
• For JSON Schema changes: I updated the migration scripts or explained why it is not needed.

• 🚫 I have added a test that covers the exact scenario we are fixing. For complex issues, comment the issue number in the test for future reference. (I do not have access to an IBM-i machine)

[sonarcloud]

Quality Gate passed for 'open-metadata-ingestion'

Issues
0 New issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud