RFR: 8362561: Remove diagnostic option AllowArchivingWithJavaAgent

[Ioi Lam]

Goal: simplify AOT implementation and removed unnecessary tests:

This PR removes old CDS tests that use java agents during CDS dump (to increase test coverage by triggering conditions, such as GCs, that were not happening during usual `java -Xshare:dump` operations).

Since AOT assembly is much more complex now, we have enough coverage. These old tests are no longer necessary.

With these tests removed, we no longer need the `-XX:-AllowArchivingWithJavaAgent` diagnostic flag, which has been abused by users despite the warning that this flag should not be used in production.

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Commit messages:
 - Added test case for dynamic archive with -javaagent
 - 8362561: Remove diagnostic option AllowArchivingWithJavaAgent

Changes: https://git.openjdk.org/jdk/pull/27304/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27304&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8362561
  Stats: 1198 lines in 25 files changed: 41 ins; 1147 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/27304.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27304/head:pull/27304

PR: https://git.openjdk.org/jdk/pull/27304