Update service graph view and docs
* Tempo devenv * Add logging to tempo devenv * Update readme * Formatting * Update loki image * Update tempo image
* First pass at using datasource UID when appropriate * Fix tests * be more lenient with lookup to accomodate different URLs * Make test setup get mock work like real datasource get * Fix the typing issue and remaining tests * Fix PR feedback
* Add tempo DS to devenv * Remove unsupported values from config * Add tempo ds * Remove tempo-query