GVls plugin: Fix provide SDK configuration in use to the server
Currently plugin is not providing configuration from the SDK in use for current project, so no System VAPI dir is provided for the runtime/SDK in use for the project.
Current fixes in GVls Vala Server use server autoconfiguration in order to fix communication with the client, but may we will provide symbols not in use by the project if it is not compiled inside Builder's flatpak sanboxed environment, for example when it is using the host operating system SDK.