centralized location of keys and drop_privileges = false works in debug mode only

[loopiv]

Describe the Bug

When using a centralized location for keys, e.g. /etc/ssh/authorized_keys, that is owned by root, a trusted path error occurs. However, files are created successfully when --debug is used.

Expected Behavior

Trusted path should succeed without running puppet in debug mode.

Steps to Reproduce

Steps to reproduce the behavior:

1. Add a key with target of, e.g., /etc/ssh/authorized_keys/$user and use "drop_privileges => false".
2. Run puppet agent -t
   Note trusted path error and the key file is not created.
3. Run puppet agent -t --debug
   No error and keyfile is created.

Environment

• Version 7.34.0
• Platform: Oracle Linux 8

Additional Context

This is somewhat related to #92 . In secure environments, keys are usually managed in central location and key files are owned by root(or other admin user) or not writable by the user.