TrigP1Test: add athenaHLT newJO runHLT test

Frank Winklmeierrequested to merge
fwinkl/athena:runHLT_newjoP1 into 23.0

Add a CA-based runHLT test for athenaHLT. This is mostly intended as basic functionality check and example. Having this one CA-based athenaHLT test should be sufficient until we are ready to migrate all other tests.

Relates to ATR-27049.

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