[advance submodule] Update sonic-swss head to latest (sonic-net#7932)

Advance sonic-swss submodule head to latest. New commits:

Revert "[flex-counters] Delay flex counters stats init for faster boot time" sonic-net/sonic-swss@b8b2df2
[orchagent] Remove default prefix in non default vrf sonic-net/sonic-swss@f5d522d
Fix NHG key with weight overlay flag. sonic-net/sonic-swss@e79cd50
[vs] Stablize test portchannel: test_Portchannel_oper_down end-of-tes sonic-net/sonic-swss@6627140
[bufferpool] Support for buffer pool type both sonic-net/sonic-swss@1d19185
[macsec] Fix acl entry id in updateMACsecPort sonic-net/sonic-swss@3daaa8e
[request parser] Add unit tests for request parser for multiple values sonic-net/sonic-swss@ec96602
[flex-counters] Delay flex counters stats init for faster boot time sonic-net/sonic-swss@e56c492