Stop Emitting BlackBoxResourceAnno (backport #1954) (#1958)

* Stop Emitting BlackBoxResourceAnno (#1954)

* Change HasBlackBoxResource to Resolve Resources

Change HasBlackBoxResource to resolve resources immediately and emit
BlackBoxInlineAnno instead of a BlackBoxResourceAnno.  This removes the
need for a FIRRTL compiler to grok the Java Resource API in order to
handle BlackBoxResourceAnno.

Emit BlackBoxInlineAnno from HasExtModuleResource instead of
BlackBoxResourceAnno.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>
(cherry picked from commit 820200b7

)

# Conflicts:
#	src/main/scala/chisel3/util/BlackBoxUtils.scala

* fixup! Stop Emitting BlackBoxResourceAnno (#1954)

Co-authored-by: Schuyler Eldridge <schuyler.eldridge@sifive.com>