[Bug]: test_telemetry_queue_buffer_cnt is not stable on some HWSKU

[bingwang-ms]

Issue Description

We are seeing the test is failing on some testbeds. There are two issues

1. The test is always using Ethernet0 for test. However, Ethernet0 is admin down on some HWSKU. Like topo_t0. On such devices, the pre_del_cnt and post_del_cnt are always 0, which cause the assert failure.

>       pytest_assert(pre_del_cnt > post_del_cnt,
                      "Number of queue counters count differs from expected")
E       Failed: Number of queue counters count differs from expected

2. The wait_until is not working perfectly as 60 seconds are not long enough for some low performance device. My suggestion is to change it to 120 seconds, and adding an assert to the result of wait_until like below

pytest_assert(wait_until(120, 20, 0, check_buffer_queues_cnt_cmd_output, ptfhost, gnxi_path,
               dut_ip, iface_to_check, env.gnmi_port), "gnmi server not fully restarted")

Results you see

Test should pass consistently.

Results you expected to see

Test is flaky on some testbeds.

Is it platform specific

generic

Relevant log output

No response

Output of show version

No response

Attach files (if any)

No response

[bingwang-ms]

@arfeigin Can you help take a look at this issue?