[riscv64] Port [safepoints] Various refactors

Change-Id: I55fa83f403464522ee8cebb8dd79e9aecdcc23a4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3492398
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#79312}

src/wasm/baseline/riscv64/liftoff-assembler-riscv64.h

@@ -3649,7 +3649,7 @@ void LiftoffAssembler::RecordSpillsInSafepoint(
   while (!all_spills.is_empty()) {
     LiftoffRegister reg = all_spills.GetFirstRegSet();
     if (ref_spills.has(reg)) {
-      safepoint.DefinePointerSlot(spill_offset);
+      safepoint.DefineTaggedStackSlot(spill_offset);
     }
     all_spills.clear(reg);
     ++spill_offset;