No layer logfile on Windows

**Describe the bug**
After submitting a job Cuetopia says "Log file does not exist:" when activating a layer.

**To Reproduce**
Steps to reproduce the behavior:
1. Send a job on Windows I guess

**Expected behavior**
A logfile should be created even if empty.

**Screenshots**

**Version Number**
5.12.2

**Additional context**
Window 11 environment.
All OpenCue components where installed from published release on the local computer.
No Docker.
Cuebot was started with the following commandline:
`java -jar c:\opencue\cuebot\cuebot-0.21.13-all.jar --datasource.cue-data-source.jdbc-url=jdbc:postgresql://localhost/cuebot_local --datasource.cue-data-source.username=cuebot --datasource.cue-data-source.password=***** --log.frame-log-root.default_os="c:\opencue\logs"`

Start by tracing Cuebot's handling of the --log.frame-log-root.default_os option and the layer log creation path when a job is submitted on Windows. Reproduce the activation failure in the reported Windows 11 setup and verify that an empty logfile is created instead of the "Log file does not exist" message.

Written by the indexing model from the issue text.