trunk/e1b01c2293567934c22994ce5ca9a340499e0d26: [dynamo] Skip an already-bound name when installing a global (#196822)

发生了什么

install_global trusts unique_id to hand out a free name, and within one process it does -- the counter never repeats. But the name only has to be unique in the module dict it is installed into, and that dict can already carry a binding minted by a DIFFERENT process: CompilePackage.install() seeds a captured __builtins_dict___N key into the live module globals and re-installs a loaded entry's __resume_at_* globals as…

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