Merge branch 'mlxsw-adjust-qos-tests-for-spectrum-4-testing'

Petr Machata says:

====================
mlxsw: Adjust QOS tests for Spectrum-4 testing

Amit writes:

Quality Of Service tests create congestion and verify the switch behavior.
To create congestion, they need to have more traffic than the port can
handle, so some of them force 1Gbps speed.

The tests assume that 1Gbps speed is supported. Spectrum-4 ASIC will not
support this speed in all ports, so to be able to run QOS tests there,
some adjustments are required.

Patch set overview:
Patch #1 adjusts qos_ets_strict, qos_mc_aware and sch_ets tests.
Patch #2 adjusts RED tests.
Patch #3 extends devlink_lib to support querying maximum pool size.
Patch #4 adds a test which can be used instead of qos_burst and do not
assume that 1Gbps speed is supported.
Patch #5 removes qos_burst test.
====================

Link: https://lore.kernel.org/r/cover.1663152826.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>