Add generalized benchmarking script

[FabijanC]

Usage related changes

• None

Development related changes

• The script, runnable with ./scripts/benchmark/command_stat_test.py expects to be modified as described in its code documentation.
• Add requirements.txt for Python dependencies.

Checklist:

• Checked the relevant parts of development docs
• Applied formatting - ./scripts/format.sh
• No linter errors - ./scripts/clippy_check.sh
• No unused dependencies - ./scripts/check_unused_deps.sh
• No spelling errors - ./scripts/check_spelling.sh
• Performed code self-review
• Rebased to the latest commit of the target branch (or merged it into my branch)
• Updated the docs if needed, including the TODO section
• Linked the issues which this PR resolves
• Updated the tests if needed; all passing (execution info)