Bug: Log redirection for generator does not work

[theunrepentantgeek]

Describe the bug

Attempting to redirect the log output from generator to a file does not work.

To Reproduce
Steps to reproduce the behavior:

.\generator.exe -v 3 --log_file log.txt gen-types .\azure-arm.yaml

Expected behavior

Expectation: all log lines written into log.txt
Actual: log.txt only contains 19 lines, all errors relating to invalid regex expressions

[theunrepentantgeek]

Closing/reopening to test tagging action

[stale]

This issue has been automatically marked as stale because it has not had activity in 60 days.

[theunrepentantgeek]

Closing as log redirection now works.
With the move to Zerolgr in #2964, we no longer have any commandline flags to worry about.
Normal output redirection works fine, though it's important to note that we log to stderr, not stdout.