RFR: Various build fixes

Fri Nov 18 23:26:00 UTC 2022

On Fri, 18 Nov 2022 23:07:00 GMT, William Kemper <wkemper at openjdk.org> wrote:

> A hodge-podge of fixes:
> * 32bit/64bit int assignment errors on windows
> * missing precompiled header
> * incorrect format specifiers
> * skip initialization of shenandoah unit tests when shenandoah is not running

Marked as reviewed by kdnilsen (Committer).

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PR: https://git.openjdk.org/shenandoah/pull/174