Freezing the default supported Infinispan operator channel to 2.3.x

[fabiobrz]

Description

The short term changes to fix #170

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] Feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change
• [x] Chore (non-breaking change which doesn't affect codebase; test, version modification, documentation, etc.)

Checklist

• [x] Code contributed by me aligns with current project license: Apache 2.0
• [x] Pull Request contains a description of the changes
• [x] Pull Request does not include fixes for multiple issues/topics
• [x] Code is self-descriptive and/or documented
• N/A - I have implemented unit tests to cover my changes
• [x] I tested my code in OpenShift

[openshift-ci[bot]]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

[tommaso-borgato]

LGTM, merging