Performer select calculated ages (#5110)

* Change wording of performer age at production

The Performer card had "x years old in this scene", regardless of what sort of media it was attached to. I have made both strings "x [years old] at production instead.
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Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

ui/v2.5/src/components/Scenes/SceneMergeDialog.tsx

@@ -507,6 +507,7 @@ const SceneMergeDetails: React.FC<ISceneMergeDetailsProps> = ({
           title={intl.formatMessage({ id: "performers" })}
           result={performers}
           onChange={(value) => setPerformers(value)}
+          ageFromDate={date.useNewValue ? date.newValue : date.originalValue}
         />
         <ScrapedGroupsRow
           title={intl.formatMessage({ id: "groups" })}