[code-reflection] Integrated: Move hat annotations back to core. Some groupied of common classes

[Gary Frost]

On Sat, 27 Dec 2025 14:58:12 GMT, Gary Frost <gfrost at openjdk.org> wrote:

> Realized I had incorrectly pushed some HAT annotatopns down to optkl. 
> 
> Also took opportunity to grouo utility classes into common packages.

This pull request has now been integrated.

Changeset: 0723973c
Author:    Gary Frost <gfrost at openjdk.org>
URL:       https://git.openjdk.org/babylon/commit/0723973c753f2ba28f02b472109c49866d098192
Stats:     161 lines in 104 files changed: 4 ins; 42 del; 115 mod

Move hat annotations back to core.  Some groupied of common classes

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PR: https://git.openjdk.org/babylon/pull/791