Add MC23 HI run number and timestamp to dictionaries

Chris Malena Delitzschrequested to merge
cdelitzs/athena:23.0-MC-HI into 23.0

Adding the run number and timestamp for the upcoming HI MC production to the dictionary, which is needed to e.g. prepare the conditions, collected in ATLGBLCONDTAGS-151

The values were also added to the relevant twiki: https://twiki.cern.ch/twiki/bin/view/AtlasComputing/ConditionsRun1RunNumbers#RUN_2_RUN_3_and_RUN_4

Tagging @jchapman @tscanlon @jmaurer @tlari @mbandier @schaarsc @hgray @jferrand

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