Create the tmt recipe specification

[psss]

Summary from the initial discussion:

tmt should generate a "recipe" file containing preprocessed data about tests, results, and configurations (e.g. a combination of tests.yaml, results.yaml, step.yaml, etc.) to eliminate the need for dynamic evaluation. This file can be used by tmt to reproduce a run with the exact same configuration, without requiring additional input. Users can customize the recipe, e.g. through scripts. These scripts may also integrate with tools like ReportPortal to adjust the recipe based on external data.

This issue covers: Define what information the recipe should contain.

[LecrisUT]

Recipe is not an intuitive name for what is described in #3884. With testing-farm the tmt-reproducer name was used, and I believe that's an intuitive name to use. Like

$ tmt run --reproducer run-0001.yaml
$ tmt run --reproduce run-0001.yaml

[psss]

The intention of the recipe is not just reproducing the run but allowing to submit a modified set of tests. I've updated the issue description with some more context from the discussion.