Display linked error icon for feedback v2s in list

[aliu39]

In the left-side list of the UI, the red skull icon doesn't show up for feedback v2s w/a linked error (submitted from new SDK API) .

I realized with the capability of linking errors in the new feedback API, this icon won't show up for that source. The most accurate fix is to render it conditionally when associated_event_id exists, but we need a way to store this in FeedbackIssueListItem metadata first

Originally posted by @aliu39 in #90133 (comment)

[vishnupsatish]

#92428, #92429 fix this