Exclude interfaces support in flowspec (rpd-infra)

Junos OS excludes applying the flowspec filter to traffic received on specific interfaces. A new term is added at the beginning of the flowspec filter that accepts any packet received on these specific interfaces. The new term is a variable that creates an exclusion list of terms attached to the forwarding table filter as a part of the flow specification filter. To exclude the flowspec filter from being applied to traffic received on specific interfaces, you must first configure a group-id on such interfaces by including the family inet filter group group-id statement at the [edit interfaces] hierarchy level and then attach the flowspec filter with the interface group by including the flow interface-group group-id exclude statement at the [edit routing-options] hiearchy level. You can configure only one group-id per routing instance with the set routing-options flow interface-group group-id statement.