use the primitive types in more places (#514)

src/cli/onefuzz/templates/radamsa.py

@@ -7,7 +7,7 @@ from typing import Dict, List, Optional
 
 from onefuzztypes.enums import OS, ContainerType, TaskDebugFlag, TaskType
 from onefuzztypes.models import Job, NotificationConfig
-from onefuzztypes.primitives import Container, Directory, File
+from onefuzztypes.primitives import Container, Directory, File, PoolName
 
 from onefuzz.api import Command
 
@@ -23,7 +23,7 @@ class Radamsa(Command):
         name: str,
         build: str,
         *,
-        pool_name: str,
+        pool_name: PoolName,
         target_exe: File = File("fuzz.exe"),
         setup_dir: Optional[Directory] = None,
         vm_count: int = 2,