TrigInDetEventTPCnv: fix unit tests

!76006 (merged) removed the default std::cout printout and the "DEBUG" outputs disappeared. Explicitly set the MessageSvc in the unit test and set the DEBUG level for PixelID.

cc @sroe

added urgent label

This merge request affects 1 package:

• Trigger/TrigEvent/TrigInDetEventTPCnv

This merge request affects 3 files:

• Trigger/TrigEvent/TrigInDetEventTPCnv/share/TrigInDetEventTPCnv_test.txt
• Trigger/TrigEvent/TrigInDetEventTPCnv/share/TrigInDetTrackCnv_p4_test.ref
• Trigger/TrigEvent/TrigInDetEventTPCnv/test/TrigInDetTrackCnv_p4_test.cxx

Adding @keli ,@gemmeren ,@nagano ,@sutt ,@bkerridg as watchers

added Trigger main review-pending-level-1 labels

CI Result SUCCESS (hash 0d3a8083)

	Athena
externals
cmake
make
tests

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Changes are fine and CI succeeds, approving for L1. -L1

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

merged

mentioned in commit 2eac18ec