chore: build for arm

[kayra1]

Description

Currently, if we build and deploy this charm on ARM, the deployed charm has an incompatible workload. This PR attempts to fix that.

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

[gruyaume]

Currently the efforts to build self-signed certificates on arm lead to frequent CI failures, I'm not eager to add this to notary as well honestly. Should we even attempt to build on arm for the time being?

[kayra1]

Currently the efforts to build self-signed certificates on arm lead to frequent CI failures, I'm not eager to add this to notary as well honestly. Should we even attempt to build on arm for the time being?

The way I see it we either fix it or remove it from the workflow entirely. The reason we are getting arm errors is because we hadn't released it for gocert, and now that we have a new charm we had to release for it too. This morning I manually published this charm on arm, and from now on we should never get an ARM failure again.