RFR: 8354291: [leyden] ciEnv::register_aot_method should lock the correct queue lock

[Aleksey Shipilev]

Similar to [JDK-8349748](https://bugs.openjdk.org/browse/JDK-8349748), but for newly added `ciEnv::register_aot_method`.

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/leyden/pull/54/files
  Webrev: https://webrevs.openjdk.org/?repo=leyden&pr=54&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354291
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/leyden/pull/54.diff
  Fetch: git fetch https://git.openjdk.org/leyden.git pull/54/head:pull/54

PR: https://git.openjdk.org/leyden/pull/54