RFR: 8202100: merge vm/share/InMemoryJavaCompiler w/ jdk/test/lib/compiler/InMemoryJavaCompiler

[Ramkumar Sunderbabu]

Merging vm folder's InMemoryJavaCompiler into jdk folder's merge InMemoryJavaCompiler so that maintenance is easy.

Testing done for
Tiers 1,2,3
test/hotspot/jtreg tests

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/21641/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21641&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8202100
  Stats: 223 lines in 7 files changed: 87 ins; 126 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/21641.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21641/head:pull/21641

PR: https://git.openjdk.org/jdk/pull/21641