[MemProf] Convert removal of memprof attrs and metadata to a pass (#163841)

In preparation for a follow on fix that removes these attributes and
metadata in non-LTO pipelines, convert updateMemProfAttributes to a new
MemProfRemoveInfo pass that executes at the start of the LTO backend
pass pipelines when we don't have an index indicating that we linked
with a library support hot cold operator new.

This is largely NFC from an end user perspective but changes where the
removal can be observed, hence the test updates.

A follow on change will use the new pass for non-LTO pipelines (for
cases when the bitcode is initially matched with memprof data but we
decide to complete the compile without LTO).

0 files changed, 0 insertions, 0 deletions