efs-proxy crashes on kernels with 64k page size

[glaubitz]

SUSE's OpenQA process has discovered that the efs-proxy binary will crash if the kernel uses a page size that is not 4k:

# uname -r; getconf PAGESIZE
6.4.0-150600.23.125-64kb
65536

# /usr/bin/efs-proxy --help
<jemalloc>: Unsupported system page size
<jemalloc>: Unsupported system page size
memory allocation of 4 bytes failed
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Aborted (core dumped)
exit=134