DataModelRunTests: delete obsolete testing files

Delete obsolete testing files and simplify test definition. Also correct typo in --threads option.

This merge request affects 1 package:

• Control/DataModelTest/DataModelRunTests

This merge request affects 4 files:

• Control/DataModelTest/DataModelRunTests/CMakeLists.txt
• Control/DataModelTest/DataModelRunTests/test/DataModelRunTests.xml
• Control/DataModelTest/DataModelRunTests/test/datamodel_test.sh.in
• Control/DataModelTest/DataModelRunTests/test/pre_check.sh

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash 288f130f)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
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
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 27511]

added review-approved label

removed review-pending-level-1 label

A bunch of deletion and cosmetic / typo changes, approved -- L1

mentioned in commit c5fef9ef

merged

added sweep:ignore label