Deprecate obsolete RunnerSyntax methods
The internal usage was defunct anyways and in !32 (merged) we have removed it. Now we can be sure that the syntaxes are for documentation purposes only. This means that we don't have to differentiate between the internal representation with :q: as the placeholder and the more user friendly <some description> placeholder for the query.
MRs to port the few usages of these methods will follow.