function addLlmMeta({ agent, transaction }) {
  agent.metrics.getOrCreateMetric(TRACKING_METRIC).incrementCallCount()
  transaction.trace.attributes.addAttribute(DESTINATIONS.TRANS_EVENT, 'llm', true)
}
Increments the tracking metric and sets the llm attribute on transactions

@param {object} params input params
@param {Agent} params.agent NR agent instance
@param {Transaction} params.transaction active transaction