Use bytes.Equal rather than bytes.Compare ==/!= 0

As recommended by go-staticcheck, but also might be a bit more efficient
for the compiler to implement, since we don't care about which slice of
bytes is greater than the other one.

pgtype/macaddr_test.go

@@ -22,7 +22,7 @@ func isExpectedEqHardwareAddr(a any) func(any) bool {
 			return true
 		}
 
-		return bytes.Compare(aa, vv) == 0
+		return bytes.Equal(aa, vv)
 	}
 }