feat: Add pausing/unpausing buttons to exports list

[tomasfarias]

Problem

Users are very limited with what they can do in the Batch Exports UI.

Changes

This adds support for pausing and unpausing batch exports. Also, we add a Status field to the table.

I made the Actions field a flex container to add a Delete button in a follow-up PR.

Here's a demo:

There's a couple of visual bugs you may spot in the demo:

• The size of the columns changes as the status value changes, maybe there is a way to fix this?
• The size of the play/unpause button also changes while loading (as the spinner takes up more space?). Would be nice if this also stayed constant.

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

How did you test this code?

[hazzadous]

Looks great!

Perhaps at some point we can add a test for the list page, similar to #16045 assuming that can be merged.

Also the would be great to add to the storybook mocks the appropriate endpoints.