[202012] [submodule] Update sonic-utilities submodule (#9661)

Update submodule sonic-utilities that contains the following commits:

Revert "[202012] [generate_dump] allow to extend dump with plugin scripts (sonic-net#1945)" (sonic-net#1993)
[soft-reboot] Add support for platforms based on Device Tree (sonic-net#1963)
[Reclaiming buffer][202012] Database migrator for reclaiming buffer (sonic-net#1898)
[202012] [generate_dump] allow to extend dump with plugin scripts (sonic-net#1945)

Signed-off-by: dprital <drorp@nvidia.com>