Feat: Enhance the test runs page

[gowtham-ra]

Improvements:

1. Sort the page in reverse chronological order so that the latest test runs should be listed in the beginning.
2. Maintain the state of the tags' colour so that each tag with the same name should have the same colour everywhere.
3. Test failure messages should be pre-formatted text and should be presented exactly as it is received from the API. Example: If the text has a newline character \n, the proceeding text should start from a new line.
4. Add a column to display the date and time of each test run