Improve Sisense Charts for SUS Metrics

Identify drilldowns and confidence ratings for SUS Metrics.

Current state

• https://about.gitlab.com/handbook/engineering/ux/performance-indicators/#perception-of-system-usability

Proposals

• Add a chart showing the completion of ~"SUS Survey" metrics.
• Import sanitized data from raw_text, raw_numeric, and account_age from https://docs.google.com/spreadsheets/d/1q3GC7n-aJPHXXybP1Mr50r_QygXvUXM6thsjVY789fI/edit#gid=1835113343
• Build more granular charts based on raw data to identify SUS scores by age and other factors.