Adds a helper macro "CloneIfMutablePrimitive", which tests if the
operand is a MutableHeapNumber, and if so, clones it, otherwise
returning the original value.

Also modifies the signature of "CopyPropertyArrayValues" to take a
"DestroySource" enum, indicating whether or not the resulting object is
supplanting the source object or not, and removes all default
parameters from that macro (which were not used anyways).

This corrects the issue reported in chromium:901301, where
StaNamedOwnProperty was replacing the value of a MutableHeapNumber
referenced by both the cloned object and the source object.

BUG=chromium:901301, v8:7611
R=cbruni@chromium.org, jkummerow@chromium.org

Change-Id: I43df1ddc84dfa4840e680b6affeba452ce0b6629
Reviewed-on: https://chromium-review.googlesource.com/c/1318096
Commit-Queue: Caitlin Potter <caitp@igalia.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57304}