PR validation failures on Mac M1

[ericstj]

Tests on M1 that require loading native binaries built in the repo are failing with
System.DllNotFoundException : Unable to load shared library 'LdaNative' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(libLdaNative, 1): image not found
System.DllNotFoundException : Unable to load shared library 'MatrixFactorizationNative' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(libMatrixFactorizationNative, 1): image not found

These are not being reported as failures because we're ignoring failures on M1 right now:

machinelearning/build/ci/job-template.yml

Lines 169 to 171 in 17c061a

	# Don't have M1 failures fail the build for now.
	${{ if and(contains(parameters.pool.vmImage, 'macOS'), contains(parameters.name, 'cross')) }}:
	continueOnError: true

We should fix this issue and remove this continueOnError setting.

[ericstj]

@michaelgsharp will this be addressed with #7282?