[HIP] Defer operator overloading errors

Although clang is able to defer overloading resolution
diagnostics for common functions. It does not defer
overloading resolution caused diagnostics for overloaded
operators.

This patch extends the existing deferred
diagnostic mechanism and defers a diagnostic caused
by overloaded operator.

Reviewed by: Artem Belevich

Differential Revision: https://reviews.llvm.org/D104505