Fix: data links not working in explore for Trace List queries #353
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What this PR does / why we need it:
Internal data link configs (data links that link to another data source) were added to the backend in 9.5.0. When Trace queries were added to OpenSearch, it added internal data links in the frontend. When we moved the Trace queries to run on the backend, the data links stopped working in pre 9.5.0 versions of Grafana since the backend response didn't have the internal data link config anymore. This PR adds the logic to populate the internal link config only for Trace List queries and only for the Trace Id field, it should leave all other data link configs untouched.
Which issue(s) this PR fixes:
Fixes #348
Special notes for your reviewer:
For testing, see the contributing doc for instructions on how to set up traces for OpenSearch.