[thread-cert] Thread 1.2 CI with OTBR and Backbone link (#5489)

Thread 1.2 CI with OTBR and Backbone link:
- Run OTBR in Dockers with Backbone link
- Enhance node.py to work with OTBR Docker
- Add Packet Verification for 5.11.1
  - incomplete, some steps can not pass yet, just to make sure
    Backbone traffic verification works
- Support running multiple tests simultaneously (default: each test
  run 3 instances)
- Build OTBR Docker using OpenThread PR code
- Upload code coverage in Docker

Some implementation details:
- Most existing code of node.py is shared by OTBR Docker
- Backbone related test scripts are found in
  tests/scripts/thread-cert/backbone
- A new script tests/scripts/thread-cert/run_bbr_tests.py is added to
  manage multiple running tests
- Test configuration differs according to PORT_OFFSET
  - Backbone interface name: Backbone{PORT_OFFSET}
  - Backbone network prefix: 91{PORT_OFFSET:02x}::/64
  - Docker instance name: otbr_{PORT_OFFSET}_{nodeid}
  - Output Files:
    - Pcap:
      - Thread: {test_name}_{PORT_OFFSET}.pcap
      - Backbone: {test_name}_{PORT_OFFSET}_backbone.pcap
      - Merged: {test_name}_{PORT_OFFSET}_merged.pcap
    - Log: {test_name}_{PORT_OFFSET}.log

tests/scripts/thread-cert/config.py

@@ -26,10 +26,9 @@
 #  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 #  POSSIBILITY OF SUCH DAMAGE.
 #
-from enum import Enum
 import os
+from enum import Enum
 
-from tlvs_parsing import SubTlvsFactory
 import coap
 import dtls
 import ipv6
@@ -43,6 +42,7 @@ import network_diag
 import network_layer
 import simulator
 import sniffer
+from tlvs_parsing import SubTlvsFactory
 
 # This extended address will generate the MESH_LOCAL_PREFIX
 EXTENDED_PANID = '000db80000000000'
@@ -60,8 +60,18 @@ LINK_LOCAL_ALL_NODES_ADDRESS = 'ff02::1'
 LINK_LOCAL_ALL_ROUTERS_ADDRESS = 'ff02::2'
 
 DOMAIN_PREFIX = 'fd00:7d03:7d03:7d03::/64'
+DOMAIN_PREFIX_REGEX_PATTERN = '^fd00:7d03:7d03:7d03:'
 DOMAIN_PREFIX_ALTER = 'fd00:7d04:7d04:7d04::/64'
 
+PORT_OFFSET = int(os.getenv('PORT_OFFSET', '0'))
+BACKBONE_PREFIX = f'{0x9100 + PORT_OFFSET:04x}::/64'
+BACKBONE_PREFIX_REGEX_PATTERN = f'^{0x9100 + PORT_OFFSET:04x}:'
+BACKBONE_DOCKER_NETWORK_NAME = f'backbone{PORT_OFFSET}'
+
+OTBR_DOCKER_IMAGE = os.getenv('OTBR_DOCKER_IMAGE', 'otbr-ot12-backbone-ci')
+OTBR_DOCKER_NAME_PREFIX = f'otbr_{PORT_OFFSET}_'
+OTBR_COMMIT = os.getenv('OTBR_COMMIT', 'master')
+
 ALL_NETWORK_BBRS_ADDRESS = 'ff32:40:fd00:db8:0:0:0:3'
 
 ALL_DOMAIN_BBRS_ADDRESS = 'ff32:40:fd00:7d03:7d03:7d03:0:3'
@@ -86,7 +96,17 @@ DEFAULT_MASTER_KEY = bytearray([
     0xff,
 ])
 
-ADDRESS_TYPE = Enum('ADDRESS_TYPE', ('LINK_LOCAL', 'GLOBAL', 'RLOC', 'ALOC', 'ML_EID'))
+
+class ADDRESS_TYPE(Enum):
+    LINK_LOCAL = 'LINK_LOCAL'
+    GLOBAL = 'GLOBAL'
+    RLOC = 'RLOC'
+    ALOC = 'ALOC'
+    ML_EID = 'ML_EID'
+    DUA = 'DUA'
+    BACKBONE_GUA = 'BACKBONE_GUA'
+
+
 RSSI = {
     'LINK_QULITY_0': -100,
     'LINK_QULITY_1': -95,
@@ -493,11 +513,11 @@ def create_default_thread_message_factory(master_key=DEFAULT_MASTER_KEY):
     return message.MessageFactory(lowpan_parser=lowpan_parser)
 
 
-def create_default_thread_sniffer():
-    return sniffer.Sniffer(create_default_thread_message_factory())
+def create_default_thread_sniffer(use_message_factory=True):
+    return sniffer.Sniffer(create_default_thread_message_factory() if use_message_factory else None)
 
 
-def create_default_simulator():
+def create_default_simulator(use_message_factory=True):
     if VIRTUAL_TIME:
-        return simulator.VirtualTime()
-    return simulator.RealTime()
+        return simulator.VirtualTime(use_message_factory=use_message_factory)
+    return simulator.RealTime(use_message_factory=use_message_factory)