RFR: 8325748: Serial: Move Generation::promote to TenuredGeneration

[Stefan Karlsson]

On Tue, 13 Feb 2024 14:09:41 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial moving a method, and minor doc revision.

The move looks fine.

I might have preferred if the `transform_stack_chunk` were put inside DefNewGeneration::copy_to_survivor_space, which calls `transform_stack_chunk` for the non-promoted objects. Maybe that could be done as a separate cleanup?

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Marked as reviewed by stefank (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17830#pullrequestreview-1878162473