interface: add APIs for eviction/disruption budget

[michaelawyu]

Description of your changes

This PR adds the APIs for supporting eviction and disruption budget.

I have:

• [x] Run make reviewable to ensure this PR is ready for review.

How has this code been tested

N/A

Special notes for your reviewer

N/A

[michaelawyu]

Internal only: please also see the mini UX doc for further details about this API (ping me if a link hasn't been sent).