This commit updates `VerifyOrQuit()` and `SuccessOrQuit()` macros to
include the failed condition in the error message that is printed on
a failure (in addition to function name and line number where the
error happened). This commit also changes the second parameter
(`aMessage`) to in these macros to be optional.
This commit also updates unit tests to remove the second `aMessage`
string in cases where the failure can be inferred from the condition
itself.
This commit adds three macros in a new header `arg_macros.hpp`
`OT_GET_FIRST()`, `OT_GET_RESET(...)`, and `OT_GET_SECOND()`. These
macros help with parsing variadic arguments passed to a function/macro
and can handle the case where variadic macro arguments is empty
without requiring toolchain specific behavior/support. This commit
also adds a unit test `test_macros` for the newly added macros.
Abtin Keshavarzian