This series adds a Python script that searches the code for metrics definition and their description.
Because part of the code uses a nonstandard way of definition, it uses a configuration file to resolve parameter values.
The script supports the code that uses string format and string concatenation with variables.
The documentation team will use the results to both document the existing metrics and to get the metrics changes between releases.
Replaces #16328Closesscylladb/scylladb#17479
* github.com:scylladb/scylladb:
Adding scripts/metrics-config.yml
Adding scripts/get_description.py to fetch metrics description