RFR: 8309138: Fix container tests for jdks with symlinked conf dir

[Zdenek Zambersky]

Problem:
Container tests copy tested jdk into container to do testing on it. This however does not work correctly for builds, in which conf directory is symlinked (such as fedora/rhel packages), causing failures due to missing config files in container.

Solution:
Symlinks are followed when copying tested jdk.

Testing:
tier1: OK
containers and jdk/internal/platform: [OK](https://github.com/zzambers/jdk-tester/actions/runs/5082017127/jobs/9131188265)

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Commit messages:
 - Fix docker tests for jdks with symlinked config files

Changes: https://git.openjdk.org/jdk/pull/14230/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14230&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309138
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14230.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14230/head:pull/14230

PR: https://git.openjdk.org/jdk/pull/14230