Make CI be able to use binary_elf_size_diff.py and report results.

[andy31415]

We currently have tooling that can do a reasonable diff actual flash changes for code. see
https://project-chip.github.io/connectedhomeip-doc/scripts/tools/ELF_SIZE_TOOLING.html

Overall a report looks like:

> ./scripts/tools/binary_elf_size_diff.py \
  ./out/qpg-qpg6105-light/chip-qpg6105-lighting-example.out \
  ./out/qpg-master.out

Type       Size  Function
-------  ------  -----------------------------------------------------------------------------------------------------------------------
CHANGED    -128  chip::app::CodegenDataModelProvider::WriteAttribute(chip::app::DataModel::WriteAttributeRequest const&, chip::app::A...
CHANGED     -76  chip::app::InteractionModelEngine::CheckCommandExistence(chip::app::ConcreteCommandPath const&, chip::app::DataModel...
CHANGED     -74  chip::app::reporting::Engine::CheckAccessDeniedEventPaths(chip::TLV::TLVWriter&, bool&, chip::app::ReadHandler*)
REMOVED     -58  chip::app::DataModel::EndpointFinder::EndpointFinder(chip::app::DataModel::ProviderMetadataTree*)
REMOVED     -44  chip::app::DataModel::EndpointFinder::Find(unsigned short)
CHANGED      18  chip::app::WriteHandler::WriteClusterData(chip::Access::SubjectDescriptor const&, chip::app::ConcreteDataAttributePa...
ADDED       104  chip::app::DataModel::ValidateClusterPath(chip::app::DataModel::ProviderMetadataTree*, chip::app::ConcreteClusterPat...
ADDED       224  chip::app::WriteHandler::CheckWriteAllowed(chip::Access::SubjectDescriptor const&, chip::app::ConcreteDataAttributeP...
TOTAL       -34

What we would need is for some targets (usually small arm targets, QPG would be a candidate however other platforms could be used to ... just make sure it is arm and not a linux target):

• compile with the patch (already done)
• save the compiled elf file as a "after changes" copy
• revert the PR patch and compile again
• compare "after changes" with the reverted version, to display the size delta

This would allow us to understand the scope of a change within the main binary, outside our current flash diff.