TrigL2MuonSA: cmake fix

Remove use of EIGEN_INCLUDE_DIRS. find_package was missing, and we anyway don't have a direct dependency on Eigen.

This merge request affects 1 package:

• Trigger/TrigAlgorithms/TrigL2MuonSA

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash e22c9d7f)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 17831]

The change is fine and the CI issue is unrelated. Approving.

Jason (L1)

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

merged

mentioned in commit 35f9ddc6

added sweep:ignore label