Fix a bug in ParallelFor::Execute: Argument evaluation order is undefined, so   RunWhenReady(ctx->BlockResults(), [ctx = std::move(ctx)]() { ... }) is unsafe, as ctx may be in a moved-from state when we try to evaluate ctx->BlockResults().
Fix a bug in ParallelFor::Execute: Argument evaluation order is undefined, so
  RunWhenReady(ctx->BlockResults(), [ctx = std::move(ctx)]() { ... })
is unsafe, as ctx may be in a moved-from state when we try to evaluate
ctx->BlockResults().

This appears to fix the parallel_for test crashes when built with gcc.

PiperOrigin-RevId: 355274590

tensorflow/runtime,tensorflow/runtime,tensorflow/runtime,tensorflow/runtime