Removing nightly ITk trigger test from 23.0

Merged Elliot Watton requested to merge ewatton/athena:ewatton-RemoveITkTriggerTestFrom23 into 23.0

As title describes, test was copied over from master when 23.0 was created. Not required in 23.0 as this test is only for ITk. A version exists still in master.

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