[CI] Provide XML configuration for QEMU

[KFilipek]

XML configuration for QEMU

Description

This pull request introduces a new feature to provide XML-based configuration.
The qemu_config.py script takes provided XML config and prints QEMU arguments.

Todo

• Write a script to provide args
• Add default config
• Run successfully QEMU and execute tests as previously
• Replace previous workflow
• Cleanup and undraft

Checklist

• Code compiles without errors locally
• All tests pass locally
• CI workflows execute properly

• CI workflows, not executed per PR (e.g. Nightly), execute properly
• New tests added, especially if they will fail without my changes
• Added/extended example(s) to cover this functionality
• Extended the README/documentation
• All newly added source files have a license
• All newly added source files are referenced in CMake files
• Logger (with debug/info/... messages) is used

[lukaszstolarczuk]

pls rebase, I think GHA made some bad merge/rebase and that's why QEMU failed

[lukaszstolarczuk]

nit: when you'll be adding more configs, pls re-name this one to e.g. "Default"