RFR: 8306059: improve the reliability of TestSerialGCWithCDS.java and ArchiveRelocationTest.java tests

[Calvin Cheung]

Remove the check for "Patching native pointers in heap region" from the tests because the CDS archive could be mapped to the requested address even if ArchiveRelocationMode=1.

Passed tiers 1, 2, 4 testing.

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Commit messages:
 - 8306059: improve the reliability of TestSerialGCWithCDS.java and ArchiveRelocationTest.java tests

Changes: https://git.openjdk.org/jdk/pull/13502/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13502&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306059
  Stats: 14 lines in 2 files changed: 0 ins; 12 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/13502.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13502/head:pull/13502

PR: https://git.openjdk.org/jdk/pull/13502