Replace GCX_COOP with EBR for EEHashTable bucket reclamation#124822

AaronRobinsonMSFT wants to merge 1 commit intodotnet:maindotnet/runtime:mainfrom

AaronRobinsonMSFT:ebr-eehashAaronRobinsonMSFT/runtime:ebr-eehashCopy head branch name to clipboard