[vs][dash-engine] Ensure attached ports of dash-engine being UP while starting dash-engine (#21452)

Why I did it
If the attached ports of dash-engine are not UP, the dash-engine will not be able to receive any packets.

The below is the log when starting up dash-engine without the attached ports being UP:

Calling target program-options parser
Adding interface eth1 as port 0
[09:18:14.056] [bmv2] [D] [thread 7] Adding interface eth1 as port 0
[09:18:14.102] [bmv2] [E] [thread 7] Add port operation failed
Adding interface eth2 as port 1
[09:18:14.102] [bmv2] [D] [thread 7] Adding interface eth2 as port 1
[09:18:14.150] [bmv2] [E] [thread 7] Add port operation failed

Work item tracking
Microsoft ADO 30887888:

How I did it
If the attached ports of dash-engine are not UP, ensure them to be UP before starting dash-engine

How to verify it
The dash-engine runs with ports added successfully.

Adding interface eth1 as port 0
[09:40:16.810] [bmv2] [D] [thread 11] Adding interface eth1 as port 0
Adding interface eth2 as port 1
[09:40:16.863] [bmv2] [D] [thread 11] Adding interface eth2 as port 1

Author: jimmyzhai

platform/vs/docker-dash-engine.mk

@@ -12,3 +12,4 @@ $(DOCKER_DASH_ENGINE)_LOAD_DOCKERS += $(DOCKER_CONFIG_ENGINE_BOOKWORM)
 
 $(DOCKER_DASH_ENGINE)_CONTAINER_NAME = dash_engine
 $(DOCKER_DASH_ENGINE)_CONTAINER_PRIVILEGED = true
+$(DOCKER_DASH_ENGINE)_RUN_OPT += --privileged -t

platform/vs/docker-dash-engine/Dockerfile.j2

@@ -6,7 +6,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update
 
-RUN apt-get install -f -y supervisor rsyslog  python3-pip
+RUN apt-get install -f -y net-tools supervisor rsyslog  python3-pip
 RUN pip3 install supervisord-dependent-startup
 
 COPY ["start.sh", "/usr/bin/"]

platform/vs/docker-dash-engine/start.sh

@@ -1,3 +1,9 @@
 #!/usr/bin/env bash
 
-simple_switch_grpc --interface 0@eth1 --interface 1@eth2 --log-console --no-p4
+PORT1=eth1
+PORT2=eth2
+
+[[ $(cat /sys/class/net/$PORT1/operstate) != up ]] && ifconfig $PORT1 up
+[[ $(cat /sys/class/net/$PORT2/operstate) != up ]] && ifconfig $PORT2 up
+
+simple_switch_grpc --interface 0@$PORT1 --interface 1@$PORT2 --log-console --no-p4