Fixes QoS scheduler config on chips that do not support hierarchical scheduler #2674
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What I did
This PR fixes QoS scheduler configuration failure on chips that do not support hierarchical scheduling
Why I did it
Scheduler configuration using scheduler_group SAI API fails on chips such as BCM56275 which does not support hierarchical scheduling. On these chips, scheduler_group SAI API returns error (SAI_STATUS_NOT_SUPPORTED) because it does not support L2 level scheduler configuration. On these chips, we need to use QUEUE SAI API instead to configure scheduling at the queue level.
How I verified it
Refer to UT-sairedis-log.txt
Details if related
config.txt
UT-sairedis-log.txt