fix: return "messages" instead "incompatibilities" from compatibility API · Aiven-Open/karapace@951780e

Canceling since a higher priority waiting request for 'Test Suite-jjaakola-aiven-correct-schema-compatibility-response-field' exists

The operation was canceled.

Restore cache failed: Dependencies file is not found in /home/runner/work/karapace/karapace. Supported file pattern: go.sum