UTAH – Last year, Chelsie Warren quit her job as a bus driver so she’d be free to sign up as one of Utah’s first cannabis patient cardholders and qualify for the plant-based treatment that soothes her chronic back pain. She’s found a new job since then and doesn’t regret the trade-off. But the Garland resident is disappointed she has to drive 40 minutes to the nearest cannabis pharmacy — which is often sold out of the gummies that provide her relief and sometimes also out of the raw flower she uses as a backup. She’s traveled outside Utah, where…