Add UtAssert_SIZET_EQ

[jphickey]

Is your feature request related to a problem? Please describe.
In many cases the code uses UtAssert_UINT32_EQ to check values that are actually size_t in the implementation. This is mostly OK as long as the sizes are <4GiB, which is almost always the case on flight systems that usually don't have a lot of memory.

Describe the solution you'd like
To support larger systems in the future, UT assert should have a macro that compares size_t values natively without converting down to uint32 first.

Describe alternatives you've considered
Continue using uint32 comparisons, accept limitation that this cannot be used for objects/sizes greater than 4GiB.

Additional context
Intent is to be proactive, this will probably become a limiting factor to somebody at some point. Plus it is more correct to be able to compare size_t values in a type-safe manner.

Requester Info
Joseph Hickey, Vantage Systems, Inc.