Allow the user to control how DbgEng loads symbols

[xusheng6]

Right now the DngEng loads the symbol with the default option. We should allow the user to configure it. See a list of possible values: https://learn.microsoft.com/en-us/windows-hardware/drivers/debugger/symbol-options and also https://learn.microsoft.com/en-us/windows/win32/api/dbghelp/nf-dbghelp-symsetoptions

I believe this might be related to #519 as well as several other network related issues