Remove varargs from g_assert and g_assert_not_reachable. (mono/mono#17254)

Remove varargs from g_assert and g_assert_not_reachable. (mono/mono#17254)

Remove varargs from g_assert and g_assert_not_reachable (save 200+ bytes per frame in wasm interp).

g_assertf unchanged.

I have a strong suspicion, this will save approximately 432 - sizeof (InterpFrame) bytes of stack
per function call in the WebAssembly interpreter.

It will not significantly benefit or hurt any other system.
Systems with disabled asserts will receive a small size improvement.

WebAssembly has no provision for varargs.
Emscripten emulates it.
It appears the emulation allocates room in the frame per outgoing varargs call.
No stack packing.
So each g_assert takes space.

Alternative would be to discourage or disable or remove asserts.

Commit migrated from https://github.com/mono/mono/commit/8718b75b7a89f04e2423d11a009f11b37ef802df