When installing as root on Linux with the default FHS layout
(/usr/local/lib/hermes-agent), `uv python install` placed the managed
Python under /root/.local/share/uv/python/, which non-root users cannot
traverse. The shared /usr/local/bin/hermes wrapper then failed for them
with "bad interpreter: Permission denied" when execing the venv python.
Export UV_PYTHON_INSTALL_DIR and UV_PYTHON_BIN_DIR to /usr/local/share/uv/
in the root-FHS branch of resolve_install_layout so the managed Python
is world-readable and the shared wrapper works for any user.
Closes#21457
4efb40c325