[submodule] Update submodule sonic-gnmi to the latest HEAD automatica…

…lly (#19296)

#### Why I did it
src/sonic-gnmi
```
* 5357f93 - (HEAD -> master, origin/master, origin/HEAD) Fix yang validation (#244) (19 hours ago) [ganglv]
* 20aba13 - Improve GNMI incremental config and add unit test for BGP (#239) (2 days ago) [ganglv]
* f0d0959 - Merge pull request #241 from liuh-80/dev/liuh/add_gnmi_cert_name (2 days ago) [Hua Liu]
|\ 
| failure_prs.log 9b65bde - Merge branch 'master' into dev/liuh/add_gnmi_cert_name (2 days ago) [Hua Liu]
| |\ 
| |/ 
|/| 
* | 424212b - Add aaa ut (#222) (2 days ago) [ganglv]
 / 
* 90322b3 - Revert unecessary change (10 days ago) [liuh-80]
* b7abf5a - Fix comments (10 days ago) [liuh-80]
* f47be1c - Update server_test.go (11 days ago) [Hua Liu]
* 0ae9398 - Fix test case (12 days ago) [liuh-80]
* d305bca - Fix build issue (12 days ago) [liuh-80]
* 518b332 - Merge remote-tracking branch 'origin/master' into dev/liuh/add_gnmi_cert_name (12 days ago) [liuh-80]
* 0d30cfc - Fix yang issue (12 days ago) [liuh-80]
* f2882dd - Add cert role mapping (12 days ago) [liuh-80]
* 3ee207a - Update server_test.go (2 weeks ago) [Hua Liu]
* 0f211bf - Update server_test.go (2 weeks ago) [Hua Liu]
* 6b85507 - Improve coverage (2 weeks ago) [liuh-80]
* ec096c3 - Fix split method (2 weeks ago) [liuh-80]
* 43e7a43 - Improve code (2 weeks ago) [liuh-80]
* 7c4b830 - Improve code (3 weeks ago) [liuh-80]
* b998f4e - Improve code (3 weeks ago) [liuh-80]
* 795a52b - Improve code (3 weeks ago) [liuh-80]
* 08571e3 - Add cert authorization with common name support (3 weeks ago) [liuh-80]
```
#### How I did it
#### How to verify it
#### Description for the changelog