chore: Rename SD-Core charms by adding -k8s as a suffix

[gatici]

Description

Add -k8s as a suffix in both github and Charmhub name to follow TE042 .

• Create new fiveg_nrf library
• Pin macaroonbakery to 1.3.2 which installed by juju client indirectly through pytest_operator.
  - The next protobuf version 4.21.0 has the breaking changes with the existing code
  - https://protobuf.dev/news/2022-05-06/#python-updates

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that validate the behaviour of the software
• I validated that new and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have bumped the version of the library

[gruyaume]

There's a bit more to this one and any other one that publishes libs. You will need to register the charm and create a new lib because the existing lib is registered under the old charm name.

[Gmerold]

Code changes look good to me, but there's still the other part (registration and publishing) mentioned by @gruyaume