Remove zone support

[Lagovas]

Here is removed acra-addzone tool, all zonemode related things from code, tests, benchmarks, docker files. Some of interfaces updated to support extra data additional context to be able to use AD (additional data) in AEAD (authenticated encryption with additional data) encryption. It is not used for now but left args for future extensions if we will want. But it is discussible do we need to leave it now...

It's draft because there is remaining changes in our ./examples and acrawriter wrappers. But main removings already made.

P.S. I tried to split changes into separate commits due to a lot of changes.

Checklist

• [ ] Change is covered by automated tests
• [ ] The coding guidelines are followed
• [ ] Public API has proper documentation in the Acra documentation site or has PR on documentation repository with new changes
• [ ] CHANGELOG.md is updated (in case of notable or breaking changes)
• [ ] CHANGELOG_DEV.md is updated
• [ ] Benchmark results are attached (if applicable)
• are up-to-date (in case of API changes)

[Lagovas]

We decided to merge this PR in next release after deprecating Zones. Additionaly, we should re-check our eng demos with these changes due to renaming several files in examples. Just a reminder for me.