Add HSRP Sensor support for IOSXR (#15821)

* Create iosxr.yaml

* Add files via upload

* Add files via upload

includes/definitions/discovery/iosxr.yaml

@@ -0,0 +1,19 @@
+mib: CISCO-HSRP-MIB
+modules:
+    sensors:
+        state:
+            data:
+                -
+                    oid: cHsrpGrpTable
+                    value: cHsrpGrpStandbyState
+                    num_oid: '.1.3.6.1.4.1.9.9.106.1.2.1.1.15.{{ $index }}'
+                    descr: 'HSRP Status {{ $cHsrpGrpVirtualIpAddr }}'
+                    index: 'cHsrpGrpStandbyState.{{ $index }}'
+                    group: 'HSRP'
+                    states:
+                        - { value:  1, generic: 2, graph: 0, descr: 'initial' }
+                        - { value:  2, generic: 2, graph: 0, descr: 'learn' }
+                        - { value:  3, generic: 1, graph: 0, descr: 'listen' }
+                        - { value:  4, generic: 1, graph: 0, descr: 'speak' }
+                        - { value:  5, generic: 0, graph: 0, descr: 'standby' }
+                        - { value:  6, generic: 0, graph: 0, descr: 'active' }