RFR: Include old humongous start regions when counting immediate garbage

[Y. Srinivas Ramakrishna]

On Mon, 8 Aug 2022 17:36:42 GMT, William Kemper <wkemper at openjdk.org> wrote:

> We only log these values, but we expect to one day use them to possibly shortcut an old generation collection in the same fashion as the young generation.

Ship it!

( ref: https://github.com/openjdk/shenandoah/pull/149/files/bdda91d68dc5bf09f53e30815b63b29b865a25b5#r938504467 )

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Marked as reviewed by ysr (Author).

PR: https://git.openjdk.org/shenandoah/pull/157