Unnecessary Flush Calls for Find/Classify Descriptor Command

[ifadams]

Describe the bug
Function calls to ClassifyDescriptor() and FindDescriptor() in descriptorcommand.cc copy the descriptors to storage un-necessarily

To Reproduce

1. ClassifyDescriptor() function(https://github.com/intel-innersource/libraries.databases.visual.vdms/blob/7eceb2f416976e806983e29a170e4653edab6413/src/DescriptorsCommand.cc#L490) calls in flush in Line 528
2. Flush Function calls descriptormanger.cc flush() (https://github.com/intel-innersource/libraries.databases.visual.vdms/blob/7eceb2f416976e806983e29a170e4653edab6413/src/DescriptorsManager.cc#L55) which calls vcl->store()
3. The store() function in VCL (https://github.com/intel-innersource/libraries.databases.visual.vdms/blob/7eceb2f416976e806983e29a170e4653edab6413/src/vcl/DescriptorSet.cc#L176) stores a local copy of the files with write_set_info() () (not needed if AWS only functionality is needed) and additionally calls AWS for storage

Same behavior happens in the FindDescriptor() function (https://github.com/intel-innersource/libraries.databases.visual.vdms/blob/7eceb2f416976e806983e29a170e4653edab6413/src/DescriptorsCommand.cc#L113)

Expected behavior
Both Classify and Find are read-only operations and flushing to storage should not happen