Separate core test and SDK usage test

[notdanilo]

Is your feature request related to a problem? Please describe.
SDK tests (with the examples) depend on secret keys, it means that on pull_request workflows wont' work. We want to be able to test PRs. The tests are currently running on pull_request_target and on main. It might make sense for testing core.

Describe the solution you'd like
Separate SDK tests from bolt core program tests (world, bolt-component, bolt-system).
SDK examples keypairs could be dynamically generated.

[notdanilo]

In fact, would it even possible to not rely on any secret for testing the code? :)