Develop API endpoint for symbol file consumption

Proposal

Develop an API endpoint that allows external clients, such as development tools like Visual Studio, to consume symbols from the symbol server. This endpoint will handle symbol download requests initiated by clients. When a client requests to download a symbol, it will send the symbol's signature and name to the server through this API endpoint.

The symbol server, equipped with the indexed information from the symbols indexing service and stored in the packages_nuget_symbol table, should be able to efficiently match the requested symbol with the correct .pdb (symbol) file and return it to the client.