Make builds and tests possible in Altinity's infrastructure

add comment and rename github robot token
add clickhouse instance password parameter
use Altinity's s3 bucket
Use altinityinfra dockerhub images and minor adjustments (#135)
Allow CI to be triggered on PR
Proper error reporting during docker pull and lowercase version name
allow `altinitystable` git tags
Download specific MinIO version instead of latest - same as upstream master
remove stale chmod
More stable CI/CD builds:
- Rebuilding all docker images
- Reduced number of docker images
- Rerunning functional tests even if those were already executed in previous run
Added missing dependencies for stateful tests
Re-generating _pb2 files on each test run
Changed hardcoded docker images name prefixes from `clickhouse/` to `altinityinfra/`
Pushing images as :latest too to avoid some test failures
reverted back to use clickhouse/jdbc-bridge
Fixed how version is generated: taking into account VERSION_TWEAK and VERSION_FLAVOUR
Pushing checks events data to "gh-data" instead of "default"
etc.