[native] Add spoiler to pressableMarkdownTypes
Summary:
Following the stack from @ashoat, we now add spoiler to the pressableMarkdownTypes set.
Depends on D5539
Test Plan:
Check spoilers on both Android and iOS, will attach a video below.
Reviewers: ashoat, atul, ginsu
Reviewed By: ashoat
Subscribers: tomek, ashoat
Differential Revision: https://phab.comm.dev/D5779