Instead of adding a dedicated "Request UUID" line, populate the existing
"Opportunity ID" diagnostic from the shown item's `opportunityId` (VS Code
core's `InlineCompletionContext.requestUuid`).
Drop the now-redundant telemetry-sourced "Opportunity ID" assignment: the
item value is authoritative and avoids a potentially stale
`telemetry.properties.opportunityId` for cached / typing-as-suggested
completions. Update the tests accordingly.
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>