[heavy_optimizer/riscv64] Add heavy optimizer test

Update shared tests so different tests can be enabled for the different
phases. Limit heavy optimizer to just the implemented branching/jumping
insns.

Bug: 291126189
Test: mm and berberis_host_tests
Change-Id: I4e9eb4bc7e4d217198169bbce3ef0070bc590159
Merged-In: I4e9eb4bc7e4d217198169bbce3ef0070bc590159
5 files changed