Investigate VIXL emulator for CI builds

[0xdaryl]

Creating an issue so this suggestion doesn't keep falling through the cracks. Thanks for these suggestions @Leonardo2718.

Investigate incorporating ARM's VIXL emulator in the CI builds to offset the lack of native AArch64 hardware. See:

https://github.com/armvixl/vixl

https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/getting-started-with-vixl

https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/announcing-vixl-a-dynamic-code-generation-toolkit-for-armv8