Change how parser prefixes are handled

# Feature request

Currently metrics generated by the parser get a prefix of that parsers name (e.g. sonar_coverage). This would split that prefix off of the metric name and show it somewhere else in the metrics card. Here are some mockups of how that could look:

## Description

As a user, I want to have the metric and the parsers name separated so that i can primarily focus on the metric but still have the information of where it came from available.

## Acceptance criteria
-
-
-

## Assumptions & Exclusions
- If a metric is calculated by multiple parsers and they result in different values, they are treated as different metrics, differentiated by the parser they are from
- If a metric is calculated by multiple parsers and they result in the same value, they are treated as one metric but multiple parsers are shown for their 'origin'

## Development notes (optional Task Breakdown)
- [ ]
- [ ]
- [ ]

## Open questions

No files, tests, or entry points are named. Start by tracing parser-generated metric names into the metrics card, then clarify the missing acceptance criteria for separating metric names from parser origins and handling equal or conflicting values; done should satisfy those clarified cases and match the supplied mockups.

Written by the indexing model from the issue text.