[BOLT] Move peepholes pass after sctc

Summary:
There are two peephole subpasses, remove-double-jumps and
remove-useless-conditional-branches, that operates by reading branches
directly, which makes them tricky to run before fix-branches. In the
case of remove-double-jumps, it will even lead to suboptimal code if
the patched branch was going to be removed by fix-branches when the
target is the fall-through. If the final target is a tail call, it will
lead to a broken CFG in the worst case. Fix this by moving these passes
after SCTC, which already produces CFGs with conditional tail calls.

(cherry picked from FBD18795592)