change test workflows to use ASL

[iakkus]

[Environment]: Kubernetes, bare metal
[Known affected releases]: master (includes all releases)

The tests utilize a mix of ASL as well as KNIX-specific workflow descriptions. It'd be great to make every test to utilize ASL.

Many tests can be migrated at this point. There are some tests that depend on Issue #19.

[iakkus]

Remaining tests:

• tests/performance2/: Uses checkpoints flag.

• tests/dynamic_parallel_execution_groups/: Uses session functions.

• tests/performance_interaction_latency/: Uses checkpoints flag.

• tests/session_support/: Uses session functions.

• tests/workflow_error_handling/: Uses "next" with multiple inputs to check the workflow error flag. In ASL, this could be achieved via a Parallel branch, all of which will fail when a branch fails. This test probably becomes obsolete and will be removed with branch feature/asl_knix_flag.

• tests/helloworld/helloworld-knix.json: This test case utilizes the KNIX description on purpose and will not be touched.

These tests will be handled from the other branch feature/asl_knix_flag.