Checkmk Werk 14352: use sentence case for local check metric labels

ID: 14352 Title: use sentence case for local check metric labels Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 Since werk 12185 we automatically show metrics in the output of local checks. The metric names are now consistently converted to sentence case. Below are examples for the automatic conversion LONG_METRIC_NAME -> Long metric name recommendation4WHO -> Recommendation 4 WHO weekIncidence -> Week incidence zombie_apocalypse -> Zombie apocalypse