[sonic-mgmt-docker-image] Support ptf dataplane packet poll with multiple ptf nn agents connection #21070
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Why I did it
When testing sonic with ptf dataplane connecting multiple ptf nn agents, some cases will fail because of packets queue in ptf were not polled thoroughly. This is a bug or missing feature in ptf: p4lang/ptf#207
as a short term quick fix, this PR will patch the ptf-py3 package and unblock our qualification process.
Work item tracking
How I did it
Support poll all devices in ptf dataplane.
How to verify it
Run tests using ptf dataplane on testbed
Which release branch to backport (provide reason below if selected)
Tested branch (Please provide the tested image version)
Description for the changelog
Link to config_db schema for YANG module changes
A picture of a cute animal (not mandatory but encouraged)