This move and rework also breaks the dependency of the task monitor on the UAVO subsystem,
and pushes the responsibility for updating the TaskInfo UAVO into the System module.
+review OPReview
Also fixes warnings (and bugs) in F4 STM32_USB_OTG_Driver code, allowing -Werror to be enabled for all flight code.
Fixes all other compiler warnings that would otherwise cause the flight code to not compile with -Werror enabled.
Along the way, this also adds some uses of isnan() to various places rather than questionable tests for x != x and
x == x to check for NaNs.
+review OPReview
