[submodule] Update submodule sonic-mgmt-common to the latest HEAD automatically (#16715)

#### Why I did it
src/sonic-mgmt-common
```
* 42ca0a6 - (HEAD -> master, origin/master, origin/HEAD) DB Access Layer Merges: GetTablePattern ... (#103) (10 hours ago) [a-barboza]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld