WIP: JP-3622 Update refpix step for NIR detectors to use convolution kernel

[penaguerrero]

Resolves JP-3622

Closes #

This PR addresses the addition of an optimized convolution kernel to the REFPIX step

Checklist for PR authors (skip items if you don't have permissions or they are not applicable)

• [x] added entry in CHANGES.rst within the relevant release section
• [x] updated or added relevant tests
• [ ] updated relevant documentation
• [ ] added relevant milestone
• [x] added relevant label(s)
• [ ] ran regression tests, post a link to the Jenkins job below. How to run regression tests on a PR
• [ ] All comments are resolved
• [ ] Make sure the JIRA ticket is resolved properly