[jdk21u-dev] RFR: 8315130: java.lang.IllegalAccessError when processing classlist to create CDS archive

[Timofei Pushkin]

Fixes a error which significantly complicates the use of static CDS in some applications with user-provided class loaders (workarounds require either manually editing the generated CDS classlist which is error-prone, or switching to dynamic CDS which has its own implications, or rewriting the application which is not always possible).

The conflicts were trivial: a few neighboring methods missing from this version and not directly related to the change.

The PR depends on #1833 and #1834 though it can be rewritten not to if needed.

Testing besides the CI (performed on macos/arm64): `runtime/cds`, a minimal reproducer app described in the original bug report.

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Depends on: https://git.openjdk.org/jdk21u-dev/pull/1834

Commit messages:
 - 8315130: java.lang.IllegalAccessError when processing classlist to create CDS archive

Changes: https://git.openjdk.org/jdk21u-dev/pull/1835/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1835&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315130
  Stats: 694 lines in 13 files changed: 513 ins; 121 del; 60 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1835.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1835/head:pull/1835

PR: https://git.openjdk.org/jdk21u-dev/pull/1835