[YANG][utilities] update sonic DB version string format

Old format: version_a_b_c
New format: version_<branch>_<nn>

sonic-utilities:
* 371d62a2 2024-01-13 | Revert "Enhanced route_check.py for multi_asic platforms (sonic-net#3077)" (HEAD -> master, github/ying-test-submodule-advance) [Ying Xie]
* 7ddc709a 2024-01-13 | Revert "route_check: Skip route checks if bgp feature is not enabled (sonic-net#3075)" [Ying Xie]
* 1489c727 2024-01-12 | [Techsupport]Adding more FRR and BGP dumps (sonic-net#3118) (github/master) [Sudharsan Dhamal Gopalarathnam]
* 359e6925 2024-01-11 | Disable Key Validation feature during sonic-installation for Cisco Platforms (sonic-net#3115) [selvipal]
* 9515c642 2024-01-04 | [chassis]: Support show ip bgp summary to display without error when no external neighbors are configured on chassis LC (sonic-net#3099) [Arvindsrinivasan Lakshmi Narasimhan]
* 9400691c 2023-12-25 | Fix database initialization for db_migrator (sonic-net#3100) [ganglv]
* 56dafb07 2023-12-25 | Support disable/enable syslog rate limit feature (sonic-net#3072) [Junchao-Mellanox]
* 529bb96b 2023-12-23 | route_check: Skip route checks if bgp feature is not enabled (sonic-net#3075) [anamehra]
* bcb10f18 2023-12-23 | Support golden config in db migrator (sonic-net#3076) [ganglv]
* 20d1495b 2023-12-21 | [db_migrator] add db migrator version space for 202305/202311 branch (sonic-net#3081) [Ying Xie]
* a68d3d3a 2023-12-20 | Collect module EEPROM data in dump (sonic-net#3009) [Junchao-Mellanox]
* e7a8def6 2023-12-19 | Enhanced route_check.py for multi_asic platforms (sonic-net#3077) [Deepak Singhal]

Signed-off-by: Ying Xie <ying.xie@microsoft.com>