RFR: 8356255: Add Stable Field Updaters to allow efficient lazy field evaluations [v6]

[Per Minborg]

> This sketch shows how "Stable Updaters" can be used to create stable computations of `@Stable` fields. Only one updater is needed per class, similar to `AtomicIntegerFieldUpdater`.

Per Minborg has updated the pull request incrementally with one additional commit since the last revision:

  Add convenience methods and documentations

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25040/files
  - new: https://git.openjdk.org/jdk/pull/25040/files/6342fbd8..a01ba9ab

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25040&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25040&range=04-05

  Stats: 107 lines in 2 files changed: 106 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25040.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25040/head:pull/25040

PR: https://git.openjdk.org/jdk/pull/25040