RFR: 8324259: Classes used by CDS at runtime should be archived

[Matias Saavedra Silva]

The following classes are not included in the archive at dumptime but are used at runtime when loading the archive:

[0.248s][info][class,load] java.nio.file.FileSystems source: jrt:/java.base loader: boot_loader
[0.248s][info][class,load] java.nio.file.FileSystems$DefaultFileSystemHolder source: jrt:/java.base loader: boot_loader
[0.249s][info][class,load] java.nio.file.FileSystems$DefaultFileSystemHolder$1 source: jrt:/java.base loader: boot_loader
[0.254s][info][class,load] java.net.URI$Parser source: jrt:/java.base loader: boot_loader 

This patch makes a dummy call at dumptime to archive these classes. Verified with tier 1-5 tests.

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Commit messages:
 - Added regression test
 - 8324259: Classes used by CDS at runtime should be archived

Changes: https://git.openjdk.org/jdk/pull/21232/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21232&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324259
  Stats: 78 lines in 3 files changed: 78 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21232.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21232/head:pull/21232

PR: https://git.openjdk.org/jdk/pull/21232