Talos assumes bare metal kernels support open_tree on anonymous FS
(added in 6.15). The RPi downstream kernel (6.12.x) does not, causing
shadow bind mount failures for /etc files and cascading network init
failures. This patch removes the InContainer() gate so the capability
check runs on all platforms.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
