ATLASRECTS-4840. Since MR21022 is stuck, I replace it by this.
Again the TRT event-dependent services are replaced by private tools (for now only in their most important clients) and previously cached structures are moved to a CondAlg whose postings are used by the clients.
Since MR21331 removes the event dependence of TRT_DriftFunctionTool, this is for now kept as a public tool.
In the testing there are problems with the HLT, but this is also the case when nothing is checked out in the current nightly.