[1.10>master] [MERGE #5273 @Penguinwizzard] Add arm/arm64 and chakrafull support to runtests.py
[1.10>master] [MERGE #5273 @Penguinwizzard] Add arm/arm64 and chakrafull support to runtests.py

Merge pull request #5273 from Penguinwizzard:runtestspy_arm64_full

This allows running jshost on the core unit tests easily from the python runner, as well as running core tests on arm and arm64.
Note: hold this change, and re-target to release/1.10 when ready.

Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore