The preload_runtime() method should return an error code or bool value

[AaronRobinsonMSFT]

There is no present way to preload the runtime without an abort being called in the process. This is related to #99. Ideally the preload_runtime() should be updated to return an indication if the runtime failed to load and let the application proceed normally.

DNNE/src/platform/platform.c

Line 474 in 539f1c6

DNNE_EXTERN_C DNNE_API void DNNE_CALLTYPE preload_runtime(void)

Note that this would not impact the scenario where a user directly calls an export and expects the system to lazily load the runtime.

[rlcomstock]

We could introduce a new preload_runtime_check(void) function that calls into prepare_runtime with a bool that tells it if it should abort or return true/false. That would make the same behavior for the normal call, but change it so a precheck can be made that doesn't abort/assert.

We could also return an error code. Which might just be simple and elegant. I am open for either solution.