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_n2 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]

Looks good! A couple of reminders:

Before merging this:

• Register sdcore-amf-k8s in Charmhub. Note that it's possible that the release to this new charmhub page does not work automatically. The first upload is sometimes tricky and has to be done manually. It's also possible that the current keys for the upload don't work with the new charm you'll have registered.

After merging this:

• Update the Github project name to sdcore-amf-k8s-operator

After the charm is published and released

• Change the ownership from yours to the Telco team.

[gruyaume]

@gatici Here we're still using the lib coming from charms/sdcore_nrf instead of the new charm from the NRF. You should also a new NRF lib in the NRF charm, release the NRF charm. Then here we'll need to pull it here and everywhere else that this lib is used.

The AMF also publishes a lib so you'll need to do the same here as well.

[gatici]

@gatici Here we're still using the lib coming from charms/sdcore_nrf instead of the new charm from the NRF. You should also a new NRF lib in the NRF charm, release the NRF charm. Then here we'll need to pull it here and everywhere else that this lib is used.

The AMF also publishes a lib so you'll need to do the same here as well.

fiveg_n2 library is created and fiveg_nrf is updated here after creating in nrf charm.