[jdk17u-dev] RFR: 8300926: Several startup regressions ~6-70% in 21-b6 all platforms

[Alexey Pavlyutkin]

Hi, here is backport of [JDK-8300926](https://bugs.openjdk.org/browse/JDK-8300926). The patch splits deoptimization routine into two separate phases: the first implies only marking methods to be deoptimized and the second is proper deoptimization, where only the first requires taken Compile_lock. Without the patch whole deoptimization is run under the lock preventing compilation process

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Commit messages:
 - rollback unnecessary changes to CompiledMethod
 - Backport c183fce9543ca15f5db632babecdb7797d0745e4

Changes: https://git.openjdk.org/jdk17u-dev/pull/1243/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1243&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300926
  Stats: 402 lines in 22 files changed: 206 ins; 82 del; 114 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1243.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1243/head:pull/1243

PR: https://git.openjdk.org/jdk17u-dev/pull/1243