Implement grouping options for duration type

[kgodey]

Problem

We need to ensure that records that include columns of duration types support range based grouping just like Number types via the API. Please see #384 for the implementation details.

We should be able to reuse the implementation for Number types here.

This involves:

• Implementing the grouping in the backend
• Updating the /api/v0/databases/<id>/types/ endpoint to store available grouping on this type

Additional context

• Please see these PRs for code related to grouping:
  • Record grouping #315
  • Fix grouping counts #353
• This issue is blocked by implementation of:
  • Handle INTERVAL type in the backend #430
  • Implement range based grouping for numeric types. #384
• Update filtering issues to cover storing filter/group information in the backend. #557 provides some context on storing groups.

[shivansii]

hey! can I work on this issue?

[rajatvijay]

@shivansii Sure, but note that since this does not have a help-wanted or good-first label, has a higher difficulty level.

[seancolsen]

Unassigning due to inactivity

[kgodey]

Closing this, too old, spec is likely wrong. We can create a new issue if we need this functionality in the future.