ci: Add csv results to json file

What does this MR do and why?

Add deqp-runner test results information to the generated json file.

A python program does the conversion as follows: Convert the CSV file to json and add it to the json file. It will convert CSV lines as:

"test_name,Pass,1.5"

to

{
    "test": "test_name",
    "result": "Pass",
    "duration": "1.5"
}

And add the list of results in the deqp_runner_results field of the json file.