RFR: 8272160: Avoid using 32-bit counters in CDS code [v2]

[Ioi Lam]

On Wed, 5 Nov 2025 19:33:00 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

>> There are a handful of counters in CDS code that are `int` when it would be safer to use size_t. While exploring this I discovered that the `_count` field in DumpTimeKlassSubGraphInfoTable is unused so it is removed and the one use case replaced with a more accurate value. Verified with tier1-5 tests.
>
> Matias Saavedra Silva has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Ioi comments
>  - Changes more counters and sizes to size_t

LGTM

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Marked as reviewed by iklam (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28139#pullrequestreview-3424232814