Revert "[dualtor] Leave icmp_responder running on dualtor topology"

[lolyu]

Reverts #8909

The rationale of this reversion:

It appeared that leaving icmp_responder running will have unexpected dataplane impact:

1. with garp_service running, the icmp probe replies will pollute the fdb table, those tests that assigns Vlan subnet address to ptf port will be not able to verify the traffic forwarding as the fdb mapping is not correct.
2. without garp_service running, linkmgrd will send heartbeats with dest mac as zero mac, and the probe replies that has zero mac as src mac will be dropped by the root fanout.

So let's revert it for now, and add it back when we have better solutions for the above two impacts.

[wsycqyz]

LGTM

[zjswhhh]

Hi @lolyu - can you elaborate impact#1. If you mean icmp_responder is replying non link prober requests, we should update icmp_responder.

For #2, not understanding why this is an impact. The reply is anyway not there with or without icmp_responder running.

[zjswhhh]

Created internal bug item#24616436 to track.