CalibrationData method to return a markdown text that can be displayed in reports to show the creation time for retrieved constants as well as the CCV CalCat URL.
This is an evolution for that MR: !835 (merged)
display_markdown_retrieved_constants
displays a markdown table of all constants retrieved for each module. This is represented by showing the constant creation times (without seconds or timezone) and using a reference link to the CCV on CalCat.
All of these are shown using markdown.
It is being tested on the test reference runs.