use -Wsuggest-override option conditionally for clang (#13092)
use -Wsuggest-override option conditionally for clang (#13092)

because it is only supported from version 11 onwards
arangodb/arangodb,graetzer/arangodb,graetzer/arangodb,Simran-B/arangodb,arangodb/arangodb,wiltonlazary/arangodb,graetzer/arangodb,Simran-B/arangodb,Simran-B/arangodb,arangodb/arangodb,Simran-B/arangodb,arangodb/arangodb,arangodb/arangodb,graetzer/arangodb,wiltonlazary/arangodb,Simran-B/arangodb,Simran-B/arangodb,wiltonlazary/arangodb,graetzer/arangodb,graetzer/arangodb,wiltonlazary/arangodb,Simran-B/arangodb,graetzer/arangodb,arangodb/arangodb,graetzer/arangodb,graetzer/arangodb,graetzer/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,graetzer/arangodb,Simran-B/arangodb,Simran-B/arangodb,Simran-B/arangodb,arangodb/arangodb,wiltonlazary/arangodb,wiltonlazary/arangodb,graetzer/arangodb,graetzer/arangodb,graetzer/arangodb,arangodb/arangodb