In utassert.h allow all UtAssert macros to use UtAssertEx and __VA_ARGS__ for dynamic output strings

[asgibson]

Is your feature request related to a problem? Please describe.
I have to add UtAssert_True as an outer shell to any of the asserts that do not use dynamic arguments.

Describe the solution you'd like
Update all the macros (except for UtAssert_Simple) to use UtAssertEx as the base function, removing description and adding VA_ARGS.

Describe alternatives you've considered
UtAssert_True wrapper around calls, but this results in two asserts per check which is unnecessary.

Additional context
Wrote up the change and did not see any issues while building or running tests.

Requester Info
Alan Gibson NASA GSFC/587