[sonic-utilities] Update sonic-utilities submodule to pick set of new fixes (#6282)

submodule sonic-utilities in sonic-buildimage has not been updated for a while and there were many fixes needed to be picked up to ease debug/development in master branch.

Here are the list of changes that this update will bring in:

* de14939 2020-12-27 | Revert "[pytest][qos][config] Added pytests for "config qos reload" commands (#1266)" (HEAD -> master, origin/master, origin/HEAD) [Guohan Lu]
* ef3370d 2020-12-24 | [fast-reboot]: Stop sflow during fast-reboot (#1296) [jangidrk]
* ff1db4d 2020-12-24 | [fast-reboot]: Update fast-reboot-dump.py to handle invalid parsing of genetlink type hostif object id attribute (#1318) [jangidrk]
* d63d11d 2020-12-23 | Added show ip/v6 route summary support for multi-asic platform (#1320) [gechiang]
* 6202a81 2020-12-23 | [pytest][qos][config] Added pytests for "config qos reload" commands (#1266) [Mahesh Maddikayala]
* f555e9e 2020-12-23 | [CRM]Add support for snat, dnat and ipmc crm resources (#1258) [Prabhu Sreenivasan]
* f44e57e 2020-12-22 | Retain fgnhg state db table entry during warm reboot (#1315) [weixchen1215]
* 5e18bf5 2020-12-23 | Fix exception handling in python3 (#1324) [bingwang-ms]
* b6221f4 2020-12-22 | [config] Add unit tests for 'config interface breakout' command (#1223) [Praveen Chaudhary]
* 150642e 2020-12-22 | [dropcounters] Fix clear for non-root users (#1253) [Danny Allen]
* becf5b5 2020-12-21 | Kubernetes support commands update (#1133) [Renuka Manavalan]
* aad2c38 2020-12-19 | VXLAN config and show utilities (#870) [Rajesh Sankaran]
* 9419627 2020-12-17 | [Multi-asic] Enhanced Feature Table configuration for multi-asic platforms (#1152) [abdosi]
* 155f6d5 2020-12-17 | [config vlan]: Remove `-t` flag from docker exec command (#1317) [Lawrence Lee]
* 281b157 2020-12-17 | [fast-reboot-dump] Fix exception in struct.pack (#1309) [bingwang-ms]
* 269c317 2020-12-16 | Mgmt vrf/SNMP agent validations and bug fixes (#1289) [Suman Kumar]
* 394b202 2020-12-16 | [Dynamic buffer calc] Support dynamic buffer calculation (#973) [Stephen Sun]
* 6dd5d31 2020-12-14 | show tech with platform dump option (#1158) [Sujin Kang]
* 6255384 2020-12-13 | [kdump]: Parse sonic_platform kernel command line parameter to read the platform identifier string (#1291) [rajendra-dendukuri]
* 0603c0b 2020-12-13 | [pcieutil] Remove 'pcie-' prefix from arguments (#1297) [Joe LeVeque]
* 10ffc28 2020-12-13 | Added 'detailed' option for 'show interface counters' command (#1299) [Akhilesh Samineni]
* 980ea0d 2020-12-11 | Fix show ip route summary on pizzabox platforms (#1302) [gechiang]
* af1bb47 2020-12-10 | [acl_loader] Fix default DENY rule for V6 dataplane ACLs (#1281) [Danny Allen]
* 57a0b41 2020-12-09 | Add show and clear commands for headroom pool watermark  (#1144) [Neetha John]
* d414970 2020-12-08 | [unit test][CLI][pfcwd] Added pfcwd config tests for single and multi ASIC platform. (#1248) [Mahesh Maddikayala]
* 2b4a58c 2020-12-08 | [sflow] Fix traceback seen for show sflow interface (#1282) [Garrick He]
* e22980f 2020-12-09 | [config/console][consutil] Support enable/disable console switch (#1275) [Blueve]
* 2f263c4 2020-12-08 | [fast-reboot] Fix fast-reboot when NDP entries are present (#1295) [shlomibitton]
* 326e534 2020-12-07 | Fast-reboot: add a new flag to ignore ASIC config checksum verification failures (#1292) [Vaibhav Hemant Dixit]
* 042254e 2020-12-04 | Kdump improvements (#1284) [rajendra-dendukuri]