runs an intergation test in linux, windows and macos

[Christian-B]

The main purpose here is to have github actions run an actual job using spalloc proxy.

The c build action has been changed

• some reordering
• download the FEC binaries, PyNN binaries and the log.sqlite3 file

Then a new job has been added which runs an actual job on an actual machine

• uploads the above files to a external_binaries directory
• add a cfg settings to say where these files are.
• tests the newly added proxy_integration_tests

The first integration test is a very simple graph but in debug nodes so all reporting is tried.

Note the spynnaker_neuron_graph_network_specification_report will raise a caught exception in Windows and macos as installing the graphviz on these platforms was considered out of scope for a rarely used report.

These Support script/ yml files are a key part of this work but had to go into main to work.

Single workflow to run all python tests. With flags for the difference between repositories
https://github.com/SpiNNakerManchester/SupportScripts/blob/main/.github/workflows/python_checks.yml

A shared action for all the preparation setup work.
https://github.com/SpiNNakerManchester/SupportScripts/tree/main/actions/prepare

Install the Linux package or skip if not in linux

• graphviz is uses so little that it is not worth working out how to install in mac and windows
• othwrs packages only used for c builds which we only do in lunix
  https://github.com/SpiNNakerManchester/SupportScripts/blob/main/actions/apt-get-install/action.yml

Depends on/ includes:
SpiNNakerManchester/SpiNNUtils#272
SpiNNakerManchester/SpiNNMachine#264
SpiNNakerManchester/SpiNNMan#405
SpiNNakerManchester/PACMAN#564
SpiNNakerManchester/SpiNNFrontEndCommon#1192
SpiNNakerManchester/MarkovChainMonteCarlo#67

Will need branch protection rules changing either before or after the pr.

[coveralls]

coverage: 67.979% (-0.09%) from 68.073%
when pulling de3834f on use_build
into bf0371f on master.