Optional sort by name in `LogMemoryManagerStateToFile`

[jpluimers]

Currently this method sorts by TotalMemoryUsage:

function LogMemoryManagerStateToFile(const AFileName: string; const AAdditionalDetails: string = ''): Boolean;

For monitoring live memory allocations in an application, and comparing before/after in a call stack, it can make sense to have a different sort order, for instance on the "Name" or InstanceCount of the TMemoryLogNode item.

As far as I can see now this would require a couple of changes:

• introduce a mechanism to specify the sort order (could as simple as an enumeration type or set of enumeration type with default value to mean TotalMemoryUsage)
• abstract the name generation part of LogMemoryManagerStateToFile into a separate method
• abstract comparison of two TMemoryLogNode items into a separate method similar to System.Generic.Collections.TList.Sort (IComparer<T>) but without using interfaces (and implementations that avoid allocating heap memory)
• adopt these methods to allow for a different sorting mechanism:
  • procedure QuickSortLogNodes(APLeftItem: PMemoryLogNodes; ARightIndex: Integer);
  • procedure InsertionSortLogNodes(APLeftItem: PMemoryLogNodes; ARightIndex: Integer);