* Allow dynamic directory entries with virtualfs
* Tests for new virtualfs implementation
* Add escape hatch for estimator during upload
Some virtualfs.StreamingDirectory-s may not be able to (efficiently)
support iterating through entries multiple times. Make a way for the
estimator to ask if they support multiple iterations and skip the
directory if they do not.
* Exapand Directory interface
Expand the Directory interface instead of making a new interface as it's
error-prone to ensure all wrapper types properly handle types that use
the new interface.
* Post-rebase fixes
* Make StreamingDirectory single iteration only
Simplify code and test slightly by not allowing users to declare a
StreamingDirectory that can be iterated through multiple times.
* Add better test for estimator ignoring stream dir
Previous test in uploader had a race condition, meaning it may not catch
all cases.
* Ignore atomic access in checklocks
Comparisons known to be done after all additions to the variables in
question.
* Implement reviewer feedback
* Remove unused function parameter
61e651d30c