Increase code_quality job timeout to 20m

What does this MR do and why?

I noticed that code_quality jobs have been failing increasingly recently. This seems to be supported by the data:

This seems to be due to the jobs frequently hitting the current 15 minute timeout. The P90 of successful code_quality jobs has increased to 15 minutes starting 2024-06-10:

Therefore, this MR increases the timeout of the code_quality job to 17 minutes