pending changes for suppressions

1. Suppressions are grouped by spec
2. PR updating RPSaaSMaster is ready to merge at the same time as this one.
3. Change rule to use regex instead of special-casing .* (can be in a separate PR).

Start by locating the suppression grouping logic and the rule that special-cases `.*`; the issue provides no file or test names. Check how suppressions are currently grouped by spec, coordinate the change with the RPSaaSMaster update mentioned in the issue, and verify that the rule uses regex matching without special-casing `.*`.

Written by the indexing model from the issue text.