ElfPointerArraySectionAddModifier modifications do not propogate to children view (ElfVirtualAddress)

What is the problem? (Here is where you provide a complete Traceback.)
The following test, when added to TestElfPointerArraySectionModifier (from #71 ), fails.

    async def test_elf_pointer_array_section_modifier_virtual_address(self, elf_resource: Resource):
        """
        Test that `ElfPointerArraySectionModifier` results in updates to the children
        `ElfVirtualAddress`.
        """
        pointer_array_section = await self._unpack_and_get_first_pointer_array_section(elf_resource)
        original_values = list(await pointer_array_section.get_entries())

        await pointer_array_section.resource.run(
            ElfPointerArraySectionAddModifier,
            ElfPointerArraySectionAddModifierConfig(skip_list=(), add_value=self.add_value),
        )
        updated_pointer_array_section = await pointer_array_section.resource.view_as(
            ElfPointerArraySection
        )

        for i, entry in enumerate(await updated_pointer_array_section.get_entries()):
            assert entry.value - self.add_value == original_values[i].value

This test appears to fail because the ElfVirtualAddress.value is not updated when the section's entries are retrieved after ElfPointerArraySectionAddModifier is run.

Please provide some information about your environment.
At minimum we would like the following information on your platform and Python environment:
This was first observed when running the make image container on #71.

If you've discovered it, what is the root cause of the problem?
This could possibly be related to the way in which ElfPointerArraySectionAddModifier is implemented: it does not iterate over its children, but rather modifies its own data directly.

How often does the issue happen?
Every time the above-referenced test is run

Start with the failing test in TestElfPointerArraySectionModifier: test_elf_pointer_array_section_modifier_virtual_address. Read ElfPointerArraySectionAddModifier, ElfPointerArraySectionAddModifierConfig, ElfPointerArraySection, and ElfVirtualAddress to trace how entries and child values are retrieved. Done means the test passes and each updated entry value reflects add_value relative to its original value.