Add DecReportsMonitor to HLT2

The MR adds the monitoring of decisions to HLT2. The monitor cannot run in the output sequence as it would not see all events and only count the ones which were accepted. Therefore, the monitor is added after the trigger lines in a new main control flow node with the type NONLAZY_OR. To not use too much resources, the monitoring is only run on 10% of the events.

The current solution adds another layer of control flow nodes, we could make it simpler by not requiring to run on every event. In this case we would need an external normalization to monitor accept fractions.

requested review from @rmatev

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• 15076dd3 - Fixed formatting

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• cbe424d9 - add additonal control flow node containing lines and monitoring

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changed the description

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• a4cfa69c - Fixed formatting
• 51dbc302 - small fix

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• 3d03ee39 - fix tests

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• 99dcc5c6 - improve description

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assigned to @acasaisv

The MR is ready to test. I ran some HLT2 tests myself and expect one failing test which should only need a trivial reference update.

marked this merge request as ready

/ci-test

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• [2022-09-22 11:01] Validation started with lhcb-master-mr#5705
• [2022-09-26 10:33] Validation started with lhcb-master-mr#5755

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assigned to @rmatev and unassigned @acasaisv

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• f4a713fa - Add prescale to monitor

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