Add test case for nested subworkflow skip

                if step["workflow_step_label"] == "a_tool_step":

                    assert sum(1 for j in step["jobs"] if j["state"] == "skipped") == 1

    def test_run_nested_conditional_workflow_steps(self):

        with self.dataset_populator.test_history() as history_id:

            summary = self._run_workflow(

                """

class: GalaxyWorkflow

inputs:

  dataset:

    type: data

  when:

    type: boolean

outputs:

  output:

    outputSource: outer_subworkflow/output

steps:

- label: outer_subworkflow

  when: $(inputs.when)

  in:

    dataset:

      source: dataset

    when:

      source: when

  run:

    class: GalaxyWorkflow

    label: subworkflow cat1

    inputs:

      dataset:

        type: data

    outputs:

      output:

        outputSource: cat1_workflow/output

    steps:

    - label: cat1_workflow

      in:

        dataset:

          source: dataset

      run:

        class: GalaxyWorkflow

        label: cat1

        inputs:

          dataset:

            type: data

        outputs:

          output:

            outputSource: cat1/out_file1

        steps:

        - tool_id: cat1

          label: cat1

          in:

            input1:

              source: dataset

""",

                test_data="""

dataset:

  value: 1.bed

  type: File

when:

  value: false

  type: raw

""",

                history_id=history_id,

                wait=True,

                assert_ok=True,

            )

            invocation_details = self.workflow_populator.get_invocation(summary.invocation_id, step_details=True)

            subworkflow_invocation_id = invocation_details["steps"][-1]["subworkflow_invocation_id"]

            self.workflow_populator.wait_for_invocation_and_jobs(

                history_id=history_id, workflow_id="whatever", invocation_id=subworkflow_invocation_id

            )

            invocation_details = self.workflow_populator.get_invocation(subworkflow_invocation_id, step_details=True)

            subworkflow_invocation_id = invocation_details["steps"][-1]["subworkflow_invocation_id"]

            self.workflow_populator.wait_for_invocation_and_jobs(

                history_id=history_id, workflow_id="whatever", invocation_id=subworkflow_invocation_id

            )

            invocation_details = self.workflow_populator.get_invocation(subworkflow_invocation_id, step_details=True)

            for step in invocation_details["steps"]:

                if step["workflow_step_label"] == "cat1":

                    assert sum(1 for j in step["jobs"] if j["state"] == "skipped") == 1

    def test_run_workflow_conditional_step_map_over_expression_tool(self):

        with self.dataset_populator.test_history() as history_id:

            summary = self._run_workflow(