Enable /dev/sgx_vepc access for the group 'sgx'

Enable /dev/sgx_vepc access for the group 'sgx', which allows KVM-backed VMs
to host Intel Software Guard eXtension (SGX) enclaves. The upcoming QEMU
6.2 uses /dev/sgx_vepc to reserve portions of Enclave Page Cache (EPC) for
VMs. EPC is the reserved physical memory used for hosting enclaves.

rules.d/50-udev-default.rules.in

@@ -41,6 +41,7 @@ SUBSYSTEM=="drm", KERNEL=="renderD*", GROUP="render", MODE="{{GROUP_RENDER_MODE}
 SUBSYSTEM=="kfd", GROUP="render", MODE="{{GROUP_RENDER_MODE}}"
 
 SUBSYSTEM=="misc", KERNEL=="sgx_enclave", GROUP="sgx", MODE="0660"
+SUBSYSTEM=="misc", KERNEL=="sgx_vepc", GROUP="sgx", MODE="0660"
 
 # When using static_node= with non-default permissions, also update
 # tmpfiles.d/static-nodes-permissions.conf.in to keep permissions synchronized.