Make cstest error reports more readable

[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

If cstest fails it should be easy to spot what the error was and how it should have looked like.
This is currently not done. Mostly due to cmocka. It encapsulates the test case too much, making it hard to report other information outside if it fails (e.g. line number etc.).

The current usage is quite annoying.

Additional context

None