RFR: 8341485: GenShen: Make evac tracker a non-product feature and confine it to generational mode

[Y. Srinivas Ramakrishna]

On Tue, 8 Oct 2024 00:17:03 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Not clean.

Backport LGTM. Reviewed!

(The windows-x64 test failures look unrelated, but have you seen these before?)

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Marked as reviewed by ysr (Committer).

PR Review: https://git.openjdk.org/shenandoah-jdk21u/pull/117#pullrequestreview-2355595950