Tick collector adaptation

[phoebusm]

Reference Issues/PRs

Part of https://github.com/man-group/arcticdb-ursus/issues/18

What does this implement or fix?

No added features. It's mostly adaptation so collector can be ported in another repo depends on this repo. Notably changes on aggregator.

Any other comments?

After merging this PR, need to update pin at another repo

Checklist

Checklist for code changes...

• [ ] Have you updated the relevant docstrings, documentation and copyright notice?
• [ ] Is this contribution tested against all ArcticDB's features?
• [ ] Do all exceptions introduced raise appropriate error messages?
• [ ] Are API changes highlighted in the PR description?
• [ ] Is the PR labelled as enhancement or bug so it appears in autogenerated release notes?