Resolve "Distribution of requests over time"

What does this mr do?

Implements the graph on the live statistic page for the distribution of requests over time. Supports customisation of how many buckets and shared labs.

Screenshots

Graph

Filter

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide.

Closes #582 (closed)