Extract httpConfig and scheduler configuration out of jetty.xml

[sbordet]

Jetty version 10.0.x

Description I guess for historical reasons, jetty.xml contains HttpConfiguration configuration, which should instead be factored out into its own module.

Similarly, the scheduler configuration should be factored out, like it has already been done for the thread pool and the bytebuffer pool.

[github-actions[bot]]

This issue has been automatically marked as stale because it has been a full year without activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions[bot]]

This issue has been automatically marked as stale because it has been a full year without activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions[bot]]

This issue has been automatically marked as stale because it has been a full year without activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gregw]

@sbordet I bumped this to 12.1 (but we should still hurry to do this soon)