NGEN: verify that we process handle indirections correctly

[erozenfeld]

Any differences in how handles should be interpreted (no indirection, single indirection, double indirection) is already abstracted via InfoAccessType enum. When we get a handle from the CLR we also get an InfoAccessType value:

// Can a value be accessed directly from JITed code.
enum InfoAccessType
{
IAT_VALUE, // The info value is directly available
IAT_PVALUE, // The value needs to be accessed via an indirection
IAT_PPVALUE // The value needs to be accessed via a double indirection
};

We need to make sure the existing code is correct for the new codepaths.