Checkmk Werk 15678: schemas: regex pattern updates

ID: 15678 Title: schemas: regex pattern updates Component: REST API Level: 1 Class: Bug fix Version: 2.3.0b1 This werk introduces a fix to the pattern attribute in various rest-api schemas. To avoid partial matches, regex patterns should start with the caret and end with the dollar symbol. Also, the + symbol should be preferred over the * symbol as the * symbol allowed for zero or more matches instead of 1 or more which is what the + symbol gives us. For patterns that list possible options, e.g. monday|tuesday|wedneday... etc they have instead been removed and replaced with enums.