SERVER-76179 Add RuntimeDirectory to mongod.service for RPM

buildscripts/package_test_internal.py

@@ -332,6 +332,7 @@ def test_install_is_complete(test_args: TestArgs):
 
     required_dirs = [
         pathlib.Path('/run/mongodb'),
+        pathlib.Path('/var/run/mongodb'),
         pathlib.Path(test_args['mongo_work_dir']),
     ]  # type: List[pathlib.Path]
 

rpm/mongod.service

@@ -11,6 +11,7 @@ Environment="OPTIONS=-f /etc/mongod.conf"
 Environment="MONGODB_CONFIG_OVERRIDE_NOFORK=1"
 EnvironmentFile=-/etc/sysconfig/mongod
 ExecStart=/usr/bin/mongod $OPTIONS
+RuntimeDirectory=mongodb
 # file size
 LimitFSIZE=infinity
 # cpu time