Withdrawn: Make use of nanoseconds for GC times

[duke]

On Thu, 2 Dec 2021 23:34:10 GMT, David Alvarez <duke at openjdk.org> wrote:

> In multiple places for hotspot management the resolution used for times is milliseconds. With new collectors getting into sub-millisecond pause times, this resolution is not enough.
> 
> This change moves internal values in LastGcStat to use milliseconds. GcInfo is still reporting the values in milliseconds for compatibility reasons

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/shenandoah/pull/102