RFR (S) 8244729: Shenandoah: remove resolve paths from SBSA::generate_shenandoah_lrb

[Aleksey Shipilev]

RFE:
  https://bugs.openjdk.java.net/browse/JDK-8244729

After JDK-8232992, we don't need the resolve path in ShenandoahBarrierSetAssembler. The slowpath
call to ShenandoahRuntime would fix the reference, and we would not have to resolve it once again.

Webrev:
  https://cr.openjdk.java.net/~shade/8244729/webrev.01/

Testing: hotspot_gc_shenandoah {x86_64, aarch64}

-- 
Thanks,
-Aleksey