MDBF-1176: Add C/ODBC Windows host

Related to GitLab MR:
https://gitlab.com/mariadb/sysadmin/-/merge_requests/112

from hz-dev-bbm
```
2026-04-07 07:44:49+0000 [Broker,7,100.64.101.43] worker 'bbw5-windows' attaching from IPv4Address(type='TCP', host='100.64.101.43', port=60371)
2026-04-07 07:44:49+0000 [Broker,7,100.64.101.43] Got workerinfo from 'bbw5-windows'
2026-04-07 07:44:49+0000 [-] bot attached
```

Author: RazvanLiviuVarzaru

master-migration/workers.yaml

@@ -39,3 +39,8 @@
   arch: aarch64
   total_jobs: 10
   os_type: macos
+
+- name: bbw5-windows
+  arch: amd64
+  total_jobs: 12
+  os_type: windows

master-private.cfg-sample

@@ -52,6 +52,7 @@ private["worker_pass"]= {
     "bbw2-mac": "1234",
     "bbw3-windows":"1234",
     "bbw4-windows":"1234",
+    "bbw5-windows":"1234",
     "bb-rhel8-docker":"1234",
     "bb-rhel9-docker":"1234",
     "monty-bbw1-x64": "1234",