report transient errors as transient errors

The Fail method for acquire methods has a boolean parameter indicating
the transient-nature of a reported error. The problem with this is that
Fail is called very late at a point where it is no longer easily
identifiable if an error is indeed transient or not, so some calls were
and some weren't and the acquire system would later mostly ignore the
transient flag and guess by using the FailReason instead.

Introducing a tri-state enum we can pass the information about fatal or
transient errors through the callstack to generate the correct fails.

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