Withdrawn: 8286739: Refactor FreeListConfig

[duke]

On Fri, 13 May 2022 14:45:25 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> This PR consists of two commits:
> 
> 1 is about making `FreeListConfig` an "interface" of `allocate/deallocate`.
> 2 is about renaming `FreeListConfig -> MemAllocator`.
> 
> Test: hotspot_gc

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/8704