Add write barriers from Ractor::Port to Ractor
Ractor::Port will mark the ractor, so we must issue a write barrier.
This was detected by wbcheck, but we've also seen it in CI:
verify_internal_consistency_reachable_i: WB miss (O->Y) 0x000071507d8bff80 ractor/port/Ractor::Port ractor/port -> 0x0000715097f5a470 ractor/Ractor r:1 <internal:kernel>:48: [BUG] gc_verify_internal_consistency: found internal inconsistency.
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Add write barriers from Ractor::Port to Ractor
Ractor::Port will mark the ractor, so we must issue a write barrier.
This was detected by wbcheck, but we've also seen it in CI: