RFR: 8332340: Add JavacBench as a test case for CDS [v2]

[Ioi Lam]

> JavacBench is a test program that compiles 90 Java source files. It uses a fair amount of invokedynamic callsites, so it's good for testing CDS support for indy and lambda expressions.
> 
> This test was first integrated into the [leyden](https://github.com/openjdk/leyden/tree/premain) repo. Hence some of the files have copyrights in 2023.

Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:

  (1) comments from @liach; (2) added javadoc; (3) Use createTestJavaProcessBuilder() instead of createLimitedTestJavaProcessBuilder()

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19256/files
  - new: https://git.openjdk.org/jdk/pull/19256/files/10cf69d1..354665a3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19256&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19256&range=00-01

  Stats: 38 lines in 2 files changed: 17 ins; 8 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/19256.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19256/head:pull/19256

PR: https://git.openjdk.org/jdk/pull/19256