Add big endian machine to CI

[Rot127]

Feature

• New architecture module
• Support for processor extension
• Add more instruction details (elaborated below)
• Binding support for: language
• Other (elaborated below)

Describe the feature you'd like

Run cstest compiled for a big endian machine in the CI.
So we avoid issues with endianess, which we otherwise have to wait for.

We can compile with a cross-compile toolchain and run them with qemu.
Pretty straight forward.

Additional context

Stuff like #2530 gets annoying.