RFR: 8357473: Compilation spike leaves many CompileTasks in free list [v3]

[Aleksey Shipilev]

> See bug for more discussion.
> 
> This PR implements the "all the way" solution by removing the free list completely. It complements https://github.com/openjdk/jdk/pull/25364, and can go either first, or second. We will remerge the other one once either integrates.
> 
> Additional testing:
>  - [x] Linux x86_64 server fastdebug, `compiler`
>  - [ ] Linux AArch64 server fastdebug, `all`

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 - Merge branch 'master' into JDK-8357473-compile-task-free-list
 - Merge branch 'master' into JDK-8357473-compile-task-free-list
 - Also free the lock!
 - Comments and indenting
 - Basic deletion

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Changes: https://git.openjdk.org/jdk/pull/25409/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25409&range=02
  Stats: 105 lines in 4 files changed: 13 ins; 57 del; 35 mod
  Patch: https://git.openjdk.org/jdk/pull/25409.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25409/head:pull/25409

PR: https://git.openjdk.org/jdk/pull/25409