Nc fix: Refresh token related issues

[pranavxc]

Change Summary

• Instead of 403 return 401 when token invalid
• Avoid overriding existing additional roles props when loading user info using refresh token

Change type

• feat: (new feature for the user, not a new feature for build script)
• fix: (bug fix for the user, not a fix to a build script)
• docs: (changes to the documentation)
• style: (formatting, missing semi colons, etc; no production code change)
• refactor: (refactoring production code, eg. renaming a variable)
• test: (adding missing tests, refactoring tests; no production code change)
• chore: (updating grunt tasks etc; no production code change)

Test/ Verification

Provide summary of changes.

Additional information / screenshots (optional)

Anything for maintainers to be made aware of

[github-actions]

Uffizzi Preview deployment-44481 was deleted.