Clarify gen_statem:start_link/3,4 semantics
#7529
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attah
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kikofernandez
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Aug 4, 2023
In OTP-26.0 `proc_lib:start*` became synchronous, so that for all start failures the start function does not return until the failed process has terminated. For start link, additionally, it was changed to always consume an `'EXIT'` messsage delivered to the calling process, for start error returns. See erlangGH-7524, OTP-18471, erlangGH-6339, PR-6843.
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Solves #7524