Draft: RelatedTraces component should show different icon for empty traces
What does this MR do and why?
Updating the related traces component to show a different icon when there are not traces linked. This matches the look of the chart.
As on the charts we use a simple bullet point when there are is no traces data, the closes I could find to use with GlIcon
is https://gitlab-org.gitlab.io/gitlab-svgs/?q=~severity-low
Related to Use different icons in related traces widget wh... (gitlab-org/opstrace/opstrace#2962 - closed)
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