trace.el: Make it usable in batch mode as well

trace.el: Make it usable in batch mode as well

While at it, this fixes a bug where a traced function was not
able to set `deactivate-mark`.

* lisp/emacs-lisp/trace.el (trace--insert): New function, extracted
from `trace-make-advice`.  Output to stdout in batch mode.
(trace--entry-message): Rename from `trace-entry-message`.
Change calling convention.  Do the insertion directly from here.
(trace--exit-message): Rename from `trace-exit-message`.
Change calling convention.  Do the insertion directly from here.
(trace-make-advice, trace-values): Simplify accordingly.