Centralize functions used to compute the outcome of checkouts, and all its underlying structures. This includes: - making DW serializization run under milliseconds. - Using the same functions across DW, reporter, gating-reporter, kernel-workflow, kernel-qe-pipelines, taking into account "test.waived" and "issueoccurrence.is_regression". - Provide minor customizations, like gating on "untriaged ERROR" and "untriaged MISS" Jira: [CKI-7190](https://issues.redhat.com/browse/CKI-7190)