New icr.io/galasa namespace should be public

[eamansour]

Describe the bug

Related to #2490

When attempting to pull an image from icr.io/galasa, an authentication error appears:

❯ docker pull icr.io/galasa/galasa-boot-embedded-amd64:1.0.0
Error response from daemon: error from registry: Authorization required. See https://cloud.ibm.com/docs/Registry?topic=Registry-troubleshoot-auth-req - Authorization required. See https://cloud.ibm.com/docs/Registry?topic=Registry-troubleshoot-auth-req

The namespace should be public and shouldn't require authentication. This affects both 1.0.0 and 1.0.1.

For now, users can pull the 1.0.0 and 1.0.1 images from the icr.io/galasadev namespace.

Steps to reproduce

1. Run docker pull icr.io/galasa/galasa-boot-embedded-amd64:1.0.0
2. See authentication error

Expected behavior

The images should be publicly accessible and no error should appear when pulling the images.