RFR: 8359936: StableValues can release the underlying function after complete computation [v5]

[Per Minborg]

> This PR proposes to release the underlying function if a stable function or collection has invoked its underlying supplier exhaustively so that it can be collected.
> 
> This PR passes tier1, tier2, and tier3 testing on multiple platforms.

Per Minborg has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 12 additional commits since the last revision:

 - Add comment for outer.outer
 - Merge branch 'master' into sv-release-supplier2
 - Merge branch 'master' into sv-release-supplier2
 - Add a new method to StableValueImpl for improved speed
 - Merge branch 'master' into sv-release-supplier2
 - Fix performance regression
 - Clean up
 - Fix bug
 - Simplify
 - Revert to records
 - ... and 2 more: https://git.openjdk.org/jdk/compare/9b0a53dc...243479df

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/25878/files
  - new: https://git.openjdk.org/jdk/pull/25878/files/f9fd6ebb..243479df

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25878&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25878&range=03-04

  Stats: 89926 lines in 2356 files changed: 51300 ins; 25056 del; 13570 mod
  Patch: https://git.openjdk.org/jdk/pull/25878.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25878/head:pull/25878

PR: https://git.openjdk.org/jdk/pull/25878