TrigP1Test: Increase default number of events for "build" tests

Increase the default number of events for TrigP1Test "build" tests from 50 to 100, as agreed with @hartj, @jpanduro, @dzanzi. This has nearly no effect on the total test execution time, because majority of the time is anyway spent in athena initialisation. The event loop is quick for these tests.

The only exceptions are the "T0Mon" tests which include full offline reco, which is slow. For those, the old number of 50 events is kept.

This merge request affects 2 packages:

• Trigger/TrigValidation/TrigP1Test
• Trigger/TrigValidation/TrigValTools

Adding @hartj ,@jpanduro as watchers

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 3bbb1b92)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 10301]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 276a1412

added sweep:ignore label