<i18n dev> RFR: 8315444: Convert test/jdk/tools to Classfile API [v3]

[Qing Xiao]

> `/test/jdk/tools/lib/tests/JImageValidator.java`, tests in `/test/jdk/tools/jlink`, and `/test/jdk/tools/jimage`, `/test/jdk/java/time/nontestng/java/time/chrono/HijrahConfigTest.java` use on com.sun.tools.classfile and should be converted to Classfile API.

Qing Xiao has updated the pull request incrementally with two additional commits since the last revision:

 - Change the position of a brace
 - Remove unnecessary import of `impl` and added stronger verify in JImageValidator.java

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15529/files
  - new: https://git.openjdk.org/jdk/pull/15529/files/48b6401c..d7a2bd6d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15529&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15529&range=01-02

  Stats: 31 lines in 24 files changed: 6 ins; 23 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15529.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15529/head:pull/15529

PR: https://git.openjdk.org/jdk/pull/15529