migtd default policy for SVN does not work

[jyao1]

https://github.com/intel/MigTD/blob/main/config/policy.json

Currently, below is using greater-or-equal.

            "TEE_TCB_SVN.SEAM":{
                "operation":"greater-or-equal",
                "reference":"self"
            },

The meaning is: the data in destination is greater-or-equal to the data in source.
But the current flow is the data in peer is greater-or-equal to the data in local. (https://github.com/intel/MigTD/blob/main/src/policy/src/config.rs#L132)

[gaojiaqi7]

if the reference is a numerical value and operation is greater-or-equal, it means peer >= value or dst >= value?