Clarify discriminator + oneOf/anyOf/allOf usage (3.2.0 port of #3846)#3885

miqui merged 2 commits intoOAI:v3.2.0-devOAI/OpenAPI-Specification:v3.2.0-devfrom

handrews:disc-of-320handrews/OpenAPI-Specification:disc-of-320Copy head branch name to clipboard