Rank and filter performance metrics with top() function

The Datadog team has introduced the `top()` family of functions to help users cut through metrics clutter and focus on the most important metrics. These functions allow users to rank, filter, and visualize performance metrics in a way that is tailored to their specific needs. By using these functions, users can gain insights into their infrastructure and make data-driven decisions. The `top()` family of functions includes various ranking methods such as maximum, minimum, mean, area, norm, last, and others, which enable users to analyze metrics from different perspectives. Additionally, the `top_offset()` function provides an advanced way to filter out outliers and focus on a specific range of values. These functions are designed to be flexible and customizable, allowing users to create dashboards that meet their unique requirements.