Move from qos to subscription option

Release notes

Move from qos to subscription option implementing the persistence of SubscriptionOption to/from storage.

Modified all places where MqttQos was used in subscription and shared subscription to use the broader SubscriptionOption.
Updated serialization for H2 to serialize all the fields of MqttSubscriptionOption.
Adapted all the tests.

It's an intermediate step to implement the new subscription option requirements

[x] My code follows the style guidelines of this project
[x] I have commented my code, particularly in hard-to-understand areas
~~[ ] I have made corresponding changes to the documentation~~
~~[ ] I have made corresponding change to the default configuration files (and/or docker env variables)~~
[x] I have added tests that prove my fix is effective or that my feature works
[x] I have updated the Changelog if it's a feature or a fix that has to be reported