Add Subject prefix filtering support

[ludovic-boutros]

• Please check if the PR fulfills these requirements

• [x] The commit messages are descriptive

• [x] Tests for the changes have been added (for bug fixes / features)

• [x] Docs have been added / updated (for bug fixes / features)

• [x] An issue has been created for the pull requests. Some issues might require previous discussion.

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) This PR introduce the support of subject prefix filtering.

• What is the current behavior? (You can also link to an open issue here) Currently it is not possible to define which subjects should be managed.

• What is the new behavior (if this is a feature change)? As we can do with topics and groups, with this PR, we can now manage which subjects should be managed using prefixes.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?) No

Fix #526.

[ludovic-boutros]

Some tests do not pass. Currently looking for why. @purbon are some integration tests a bit flacky when running multiple times ? This could be because some bindings or ressources in general could stay in the integration cluster ?

[ludovic-boutros]

@purbon I think I have found a bug. When a prefix is defined (topic, group or now subject), cluster bindings are filtered.

[purbon]

Thanks a lot for your contributions @ludovic-boutros and team, I'm currently on holidays, but I promise to take them in as soon as possible.

[purbon]

Back from my break, thanks a lot for your help in the project again! ❤️