Specifies that Call-Stack Symbols for the Native Call-stack of each Allocation should be collected.
Native Call stacks can only be collected from a build that supports the collection of Native Call-stack information, which currently requires Source Code access.
To be able to connect each allocation to its Call-stack, the CaptureFlags.NativeAllocationSites needs to be specified as well.
对应于内存快照中的 NativeCallstackSymbol 字段。