CXXCBC-409: Add handling for 'index does not exist' query error

[DemetrisChr]

Changes

• Handle "Index does not exist" query error
• Add handling for the 5000 error code in document_query (copied the one from the query management operations)
• Handle the possibility of "status" not being included in the query response - an example where this happens is with the query drop index notfound on default;

Results

All query FIT tests pass

[DemetrisChr]

TODO: I should also make sure that we match on exist and not just exists as described in the RFC & review the checks on the Python side to ensure that they are all handled within the C++ SDK instead.

Note: the uppercase index for 5000 is not a mistake (also only match on exist not exists because there is a typo somewhere in query engine which might either print exist or exists depending on the codepath)
. Code 5000 AND message contains Index .+ already exist
. Code 4300 AND message contains index .+ already exist