Apply workaround to fix issues using the ACA-Py scripts on ARM based MACs

[WadeBarnes]

Developers using ARM based MACs commonly run into issues running the ACA-Py demos (and other scripts). The underlying reason is ACA-Py does not fully support the ARM architecture due to some of it's dependencies not supporting the ARM architecture. This issue is being addresses here; https://github.com/hyperledger/aries-cloudagent-python/issues/2124.

The workaround is to tell docker to use amd64 emulation when running on an ARM based MAC. This is done by setting DOCKER_DEFAULT_PLATFORM=linux/amd64.

A script to auto-detect ARM based MACs and set DOCKER_DEFAULT_PLATFORM=linux/amd64 has been added to von-network, apply this workaround to the affected ACA-Py scripts. https://github.com/bcgov/von-network/pull/272

[swcurran]

@amanji -- assigning this to you to close or apply a change as appropriate as related to #2124