RFR: 8359936: StableValues can release the underlying function after complete computation [v6]

[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 incrementally with two additional commits since the last revision:

 - Update src/java.base/share/classes/jdk/internal/lang/stable/StableFunction.java
   
   Co-authored-by: Viktor Klang <viktor.klang at oracle.com>
 - Update src/java.base/share/classes/jdk/internal/lang/stable/StableEnumFunction.java
   
   Co-authored-by: Viktor Klang <viktor.klang at oracle.com>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25878/files
  - new: https://git.openjdk.org/jdk/pull/25878/files/243479df..76fae6dd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25878&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25878&range=04-05

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 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