Migrate to new ProtoData

[alexander-yevsyukov]

This PR migrates to new ProtoData addressing the breaking API changes related to new package and artifact structure.

Other notable changes

• Integration tests related to Validation were copied from McJava. The history of the code changes in these tests was not preserved because of little value comparing to the efforts. Should we need the history, we could obtain it from mc-java repository. Later these tests would be reviewed and updated.

• Codegen-related tests that used to be under java-runtime moved under java-tests/runtime. This is done to test the currently developed codegen, rather than one used by McJava applied to java-runtime module.

• Validation codegen was disabled under java-runtime module to ease the migration during next breaking API change.

[codecov[bot]]

Codecov Report

Merging #120 (a141c4a) into master (dc7fa55) will not change coverage. The diff coverage is n/a.

:exclamation: Current head a141c4a differs from pull request most recent head 87c7968. Consider uploading reports for the commit 87c7968 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #120 +/- ## ========================================= Coverage 36.64% 36.64% Complexity 342 342 ========================================= Files 124 124 Lines 2423 2423 Branches 197 197 ========================================= Hits 888 888 Misses 1476 1476 Partials 59 59 ```