Fix flake in test case session_upgrade_v3_v5_qos1 (backport #13480) #13481
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CI sometimes failed with the following error:
```
v5_SUITE:session_upgrade_v3_v5_qos failed on line 1068
Reason: {test_case_failed,Received unexpected PUBLISH payload. Expected: <<"2">> Got: <<"3">>}
```
The emqtt client auto acks by default.
Therefore, if Subv3 client was able to successfully auto ack message 2
before Subv3 disconnected, Subv5 client did not receive message 2.
This commit fixes this flake by making sure that Subv3 does not ack
message 2.
(cherry picked from commit 7cf0766)
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CI sometimes failed with the following error:
The emqtt client auto acks by default.
Therefore, if Subv3 client was able to successfully auto ack message 2 before Subv3 disconnected, Subv5 client did not receive message 2.
This commit fixes this flake by making sure that Subv3 does not ack message 2.
This is an automatic backport of pull request #13480 done by [Mergify](https://mergify.com).