Describe the bug, including details regarding any error messages, version, and platform.

Child of #18014

Manually modifying #40021 to run the Python tests against a hierarchical namespace account has highlighted some missing test coverage in the existing C++ tests and some cases that we need to fix.

Currently the following fail on hierarchical namespace storage accounts.

fs->CreateDir("directory/")

fs->DeleteDir("directory/")

They fail with

Failed to delete a directory: directory/: https://tomtesthns.blob.core.windows.net/ea119933-c9d3-11ee-989a-71cec6336ac8/directory/ Azure Error: [InvalidUri] 400 The request URI is invalid.
The request URI is invalid.
RequestId:c9ad826a-101f-0005-5be0-5d0db4000000
Time:2024-02-12T18:24:12.9974541Z
Request ID: c9ad826a-101f-0005-5be0-5d0db4000000

Removing the trailing slash solves the problem.

I haven't tested but I expect DeleteDirContents probably has the same issue.

Component(s)

C++