gh-120321: Make gi_yieldfrom thread-safe in free-threading build #144292
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Add a FRAME_SUSPENDED_YIELD_FROM_LOCKED state that acts as a brief lock, preventing other threads from transitioning the frame state while gen_getyieldfrom reads the yield-from object off the stack.
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Add a FRAME_SUSPENDED_YIELD_FROM_LOCKED state that acts as a brief lock, preventing other threads from transitioning the frame state while gen_getyieldfrom reads the yield-from object off the stack.