Use-after-return sanitizer binary metadata

Currently per-function metadata consists of:
(start-pc, size, features)

This adds a new UAR feature and if it's set an additional element:
(start-pc, size, features, stack-args-size)

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D136078

GitOrigin-RevId: dbe8c2c316c40b25a0a37b91f1a1a02a55182378
7 files changed