References to time should do so using std::chrono. We reworked tests in
connectivity and drivers to use std::chrono and new APIs in order to
remove deprecation warnings resulting from deprecated API calls.
This required addition of  a macro for test assertions using std::chrono
values.

As host test "timing_drift_auto" expects time values represented as an
integral number of microseconds, we explicitly provide this in place
using "microseconds{TICKER_TIME}.count()" in the relevant ticker tests.
We recognise this is ugly, but thought it best to descriptively convert
from std::chrono to the host test's required representation.

Co-authored-by: Hari Limaye <hari.limaye@arm.com>