Searchable tokenization implementation

[Zhaars]

Current tokenization simply replaces data when we write or read. The idea of this PR is to make it possible to replace the data even in the search requests, thus the search will work during tokenization, not only encryption. We need to replace type column1=1234 with column1=54872, where 348729 is the corresponding tokenized value if consistent_tokenization setting is provided.

This PR contains an implementation of searchable tokenization for PostgreSQL for text/binary protocols.

Checklist

• [X] Change is covered by automated tests
• [X] 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)