cmake 4.x removed backward compat with cmake_minimum_required < 3.5,
breaking egl-probe compilation. Setting CMAKE_POLICY_VERSION_MINIMUM=3.5
in the base image ENV re-enables it so robomimic's egl-probe builds.
Also adds --no-cache-base flag to build script so the base can be
force-rebuilt when Dockerfile.eval-base changes, and pins hf-egl-probe
in libero extras as the upstream-fixed fork of egl-probe.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>