**Description**

This operator should cancel running workflow template `on_kill`. This option probably should be configurable because of request_id prameter in a job definition: https://googleapis.dev/python/dataproc/latest/gapic/v1/api.html#google.cloud.dataproc_v1.WorkflowTemplateServiceClient.instantiate_inline_workflow_template
https://googleapis.dev/python/dataproc/latest/gapic/v1/api.html#google.cloud.dataproc_v1.WorkflowTemplateServiceClient.instantiate_workflow_template

Note this will have to cancle the Google Long Running Operation for the workflow template (which will in turn cancel all children jobs and clean up relevant cluster).

**Use case / motivation**

Remove dangling workflow templates

**Related Issues**
#10381
#6371
self.optional_components = optional_components
        self.master_machine_type = master_machine_type
        self.master_disk_type = master_disk_type
        self.master_disk_size = master_disk_size
        self.autoscaling_policy = autoscaling_policy
        self.worker_machine_type = worker_machine_type
        self.worker_disk_type = worker_disk_type
        self.worker_disk_size = worker_disk_size
        self.zone = zone
        self.network_uri = network_uri
        self.subnetwork_uri = subnetwork_uri
        self.internal_ip_only = internal_ip_only
        self.tags = tags
        self.service_account = service_account
        self.service_account_scopes = service_account_scopes
        self.idle_delete_ttl = idle_delete_ttl
        self.auto_delete_time = auto_delete_time
        self.auto_delete_ttl = auto_delete_ttl
        self.customer_managed_key = customer_managed_key
        self.enable_component_gateway = enable_component_gateway
        self.single_node = num_workers == 0
        if self.custom_image and self.image_version:
            raise ValueError("The custom_image and image_version can't be both set")
        if self.custom_image_family and self.image_version:
            raise ValueError("The image_version and custom_image_family can't be both set")
        if self.custom_image_family and self.custom_image:
            raise ValueError("The custom_image and custom_image_family can't be both set")
        if self.single_node and self.num_preemptible_workers > 0:
            raise ValueError("Single node cannot have preemptible workers.")
    def _set_preemptibility_type(self, preemptibility: str):