[Bug]: Fix log output that should go to stderr in `container system start`.

[jglogan]

I have done the following

• I have searched the existing issues
• If possible, I've reproduced the issue using the 'main' branch of this project

Steps to reproduce

Run container system start.

Problem description

The "Verifying machine API server is running..." should be logged at info level.

In the case where the kernel needs to be installed, the "No default kernel configured." should be logged at warning level.

Using the log object ensures log output goes to stdout. Only result set info related resource management operations should go to stdout (with the exception that this information geso to standard error if a command produces binary data output on stdout; see #1804).

Environment

- OS: 26
- Xcode: 26
- Container: main

Code of Conduct

• I agree to follow this project's Code of Conduct

[adityabagchi24]

@jglogan I have fixed this issue. Please have a look at my PR #1889