Replace mem macros renaming (backport #2243) (#2255)

* Replace mem macros renaming (#2243)

* ReplaceMemMacros: add target rename test case

* ReplaceMemMacros: rename references to instances

* fix renaming for deduped mems

* use grouped DummyAnnos to preserve order

* Apply suggestions from code review

Co-authored-by: Jack Koenig <koenig@sifive.com>

* run scalafmt

* flatten targets

Co-authored-by: Jack Koenig <koenig@sifive.com>
(cherry picked from commit 62fdb87e

)

# Conflicts:
#	src/main/scala/firrtl/passes/memlib/ReplaceMemMacros.scala

* fix conflicts

* add back old APIs, add new private methods

Co-authored-by: Albert Chen <40366337+albertchen-sifive@users.noreply.github.com>
Co-authored-by: Albert Chen <albert.chen@sifive.com>