[lilliput-jdk17u:lilliput] RFR: 8320666: [Lilliput/JDK17] Add arrayOopDesc::base_offset() gtests

[Roman Kennke]

Mainline and JDK21 trees of Lilliput have a gtest that checks the base-offset of various array types under different settings. We should also have it in the Lilliput/JDK17u tree.

Testing:
 - [x] gtest:arrayOopDesc +UCOH
 - [x] gtest:arrayOopDesc -UCOH
 - [x] gtest:arrayOopDesc -CCP

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Commit messages:
 - 8320666: [Lilliput/JDK17] Add arrayOopDesc::base_offset() gtest

Changes: https://git.openjdk.org/lilliput-jdk17u/pull/65/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=65&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320666
  Stats: 55 lines in 1 file changed: 55 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/65.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u.git pull/65/head:pull/65

PR: https://git.openjdk.org/lilliput-jdk17u/pull/65