RFR: 8361397: Rework CompileLog list synchronization

[Aleksey Shipilev]

I want to remove `CompileTaskAlloc_lock` completely with [JDK-8357473](https://bugs.openjdk.org/browse/JDK-8357473), and for that we need to fix a stray use of that lock in CompileLog list linkage. We can rewrite that part to atomics.

Additional testing:
 - [ ] Linux x86_64 server fastdebug, `compiler`

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/26127/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26127&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361397
  Stats: 11 lines in 2 files changed: 4 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/26127.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26127/head:pull/26127

PR: https://git.openjdk.org/jdk/pull/26127