Advance sonic-utilities to b8173428 (sonic-net#14020)

b8173428 - [GCU] Add Sample Unit Test for RDMA Headroom Pool Size Tuning ([device/celestica] blacklist gpio_ich kernel module on haliburton sonic-net#2692) (5 hours ago) [isabelmsft]
6f84aae7 - Add begin logs to config reload/config minigraph/warm-reboot/fast-reboot (RPC syncd docker image does not start RPC server automatically sonic-net#2694) (27 hours ago) [Junchao-Mellanox]
e98011f8 - Revert "Secure upgrade ([sonic-cfggen] Multi-key should be in form of (a,b) instead of 'a|b' sonic-net#2337)" (Add Broadcom XLR/GTS ((BCM9COMX2XMC) support for Tomahawk switch (BCM956960K) sonic-net#2675) (34 hours ago) [StormLiangMS]
eda4e91b - [show][muxcable] add some new commands health, reset-cause, queue_info support for muxcable (DUT takes more than 7 seconds to finish update ip v6 neighbor sonic-net#2414) (4 days ago) [vdahiya12]
54e26359 - Replace pickle by json (Add autoneg to 7170-Q59S20 sonic-net#2636) (4 days ago) [Mai Bui]