Fix rust CI job to run on merge queue branches (#1453)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: vlad-ivanov-name <[email protected]>

Author: Copilot

.github/workflows/rust.yml

@@ -5,6 +5,7 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ '**' ]
+  merge_group:
 
 env:
   CARGO_TERM_COLOR: always