SIGMON-48 add qps thresholds

Context

• We want to include qps thresholds in the api, file with the values is attached here: https://its.cern.ch/jira/browse/SIGMON-48

What was done

• new csv generated based on the values from QPQ_parameters.xls and the sigmon metadata files (circuit_type +_LayoutDetails.csv) - saved as qps_tresholds.csv
• methods to query for the values from csv - in metadata/thresholds/qps_thresolds.py
• unit tests
• Replaced HWC_Operation_YETS_Periods.csv with updated version sent by Zinur

To do

Review objectives

• ? assessment of code functionality
• ? assessment of code quality
• ? identifying potential refactorings / logic common to other projects
• ? knowledge sharing
• ? getting help to understand a piece of code