Allow constant-propagation to be disabled (#42125)
Our heuristics for constant propagation are imperfect (and probably
never will be perfect), and I've now seen many examples of
methods that no developer would ask to have const-propped get
that treatment. In some cases the cost for latency/precompilation
is very large. This renames `@aggressive_constprop` to `@constprop`
and allows two settings, `:aggressive` and `:none`.
Closes #38983
Co-authored-by: Shuhei Kadowaki <40514306+aviatesk@users.noreply.github.com>
Co-authored-by: Martin Holters <martin.holters@hsu-hh.de>
