[submodule] Advance sonic-utilities pointer

Update sonic-utilities submodule pointer to include the following:
* e6179af Remove timer from FAST_REBOOT STATE_DB entry and use finalizer ([sonic-net#2621](sonic-net/sonic-utilities#2621))
* ff68832 [route_check] fix IPv6 address handling ([sonic-net#2722](sonic-net/sonic-utilities#2722))
* 7a604c5 update fast-reboot ([sonic-net#2728](sonic-net/sonic-utilities#2728))
* 9f83ace [GCU] Add vlanintf-validator ([sonic-net#2697](sonic-net/sonic-utilities#2697))
* 338d1c0 Check SONiC dependencies before installation. ([sonic-net#2716](sonic-net/sonic-utilities#2716))
* 64d2efd Improve show acl commands ([sonic-net#2667](sonic-net/sonic-utilities#2667))
* 2ef5b31 [GCU] Add PFC_WD RDMA validator ([sonic-net#2619](sonic-net/sonic-utilities#2619))
* c7aa841 [show][muxcable] increase timeout for displaying HW_STATUS ([sonic-net#2712](sonic-net/sonic-utilities#2712))
* 2fc2b82 YANG validation for ConfigDB Updates: MIRROR_SESSION use case ([sonic-net#2430](sonic-net/sonic-utilities#2430))
* e16bdaa Fix non-zero status exit on non secure boot system ([sonic-net#2715](sonic-net/sonic-utilities#2715))
* 90d7015 [route_check] implement a check for FRR routes not marked offloaded ([sonic-net#2531](sonic-net/sonic-utilities#2531))
* c2bc150 [warm/fast-reboot] Backup logs from tmpfs to disk during fast/warm shutdown ([sonic-net#2714](sonic-net/sonic-utilities#2714))
* a015834 [db_migrator] Add missing attribute 'weight' to route entries in APPL DB ([sonic-net#2691](sonic-net/sonic-utilities#2691))
* cd519aa [ci] Fix pipeline issue caused by sonic-slave-* change. ([sonic-net#2709](sonic-net/sonic-utilities#2709))
* 2680e6f [dhcp_relay] Fix dhcp_relay restart error while add/del vlan ([sonic-net#2688](sonic-net/sonic-utilities#2688))

Signed-off-by: dprital <[email protected]>

Author: dprital