chore: Grant statuses:write to Post Unit Tests workflow (#2520)

Adds `statuses: write` permission so the workflow_run status-post step can set the commit status (was failing with `Resource not accessible by integration`).

https://github.com/cloudquery/plugin-sdk/actions/runs/27411930203/job/81015057613

Author: erezrokah

.github/workflows/unittest-post.yml

@@ -9,6 +9,7 @@ on:
 permissions:
   contents: read
   actions: read
+  statuses: write
 
 jobs:
   post-unitests: