Add modulePorts and fullModulePorts in DataMirror for Instance (backport #4076) (#4077)
* Add modulePorts and fullModulePorts in DataMirror for Instance (#4076) (cherry picked from commit 62bbad55) # Conflicts: # core/src/main/scala/chisel3/reflect/DataMirror.scala # src/test/scala/chiselTests/reflect/DataMirrorSpec.scala * Resolve backport conflicts --------- Co-authored-by: Deborah Soung <debs@sifive.com> Co-authored-by: Jack Koenig <koenig@sifive.com>