[jdk17] RFR: 8067223: [TESTBUG] Rename Whitebox API package

[Igor Ignatyev]

Hi all,

could you please review this big tedious and trivial(-ish) patch which moves `sun.hotspot.WhiteBox` and related classes to `jdk.test.whitebox` package?

the majority of the patch is the following substitutions:
 - `s~sun/hotspot/WhiteBox~jdk/test/whitebox/WhiteBox~g`
 - `s/sun.hotspot.parser/jdk.test.whitebox.parser/g`
 - `s/sun.hotspot.cpuinfo/jdk.test.whitebox.cpuinfo/g`
 - `s/sun.hotspot.code/jdk.test.whitebox.code/g`
 - `s/sun.hotspot.gc/jdk.test.whitebox.gc/g`
 - `s/sun.hotspot.WhiteBox/jdk.test.whitebox.WhiteBox/g`

testing: tier1-4

Thanks,
-- Igor

-------------

Commit messages:
 - copyright year
 - update TEST.ROOT
 - jdk: s/sun\.hotspot\.gc/jdk.test.whitebox.gc/g
 - jdk: s/sun\.hotspot\.code/jdk.test.whitebox.code/g
 - jdk: s/sun\.hotspot\.WhiteBox/jdk.test.whitebox.WhiteBox/g
 - hotspot: 's~sun/hotspot/WhiteBox~jdk/test/whitebox/WhiteBox~g'
 - hotspot: s/sun\.hotspot\.parser/jdk.test.whitebox.parser/g
 - hotspot: s/sun\.hotspot\.cpuinfo/jdk.test.whitebox.cpuinfo/g
 - hotspot: s/sun\.hotspot\.code/jdk.test.whitebox.code/g
 - hotspot: 's/sun\.hotspot\.gc/jdk.test.whitebox.gc/g'
 - ... and 9 more: https://git.openjdk.java.net/jdk17/compare/c8ae7e5b...8f12f2cf

Changes: https://git.openjdk.java.net/jdk17/pull/290/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=290&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8067223
  Stats: 2310 lines in 949 files changed: 0 ins; 0 del; 2310 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/290.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/290/head:pull/290

PR: https://git.openjdk.java.net/jdk17/pull/290