[native] fix button container height in RemoveTagButton

Summary:
As I was factoring out logic for the remove tag button, noticed a small issue where the button was slightly shifting the height of the panel a few pixels when the content was going from "Remove tag" to the loading spinner. We should set the height of the button container so that this does not happen

Depends on D12532

Test Plan: Confirmed that the height of the button container remained the same when switching between loading and non-loading state

Reviewers: kamil, inka

Reviewed By: inka

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12533