Make computeName package private and update callsites (backport #2192) (#2194)

* Update computeName and callsites (#2192)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit d6907893

)

# Conflicts:
#	core/src/main/scala/chisel3/internal/Builder.scala

* Mergify/bp/3.4.x/pr-2192 Deprecate computeName (#2198)

* Fix merge conflict
* Restore public API for computeName and deprecate it
* Build waiver

Co-authored-by: Aditya Naik <91489422+adkian-sifive@users.noreply.github.com>
Co-authored-by: Jack Koenig <koenig@sifive.com>