RFR: 8349953: Avoid editing AOTConfiguration file in "make test JTREG=AOT_JDK=true" [v7]

[Ioi Lam]

> When running HotSpot jtreg tests in the "AOT mode", for example:
> 
> 
> make test JTREG=AOT_JDK=true TEST=open/test/hotspot/jtreg/runtime/stringtable
> 
> 
> Before this PR, in the test set up phase, we record several AOT configuration files by running a few separate Java tools (javac, javap, jlink, and jar), and then combine them together with sed, grep, sort and uniq:
> 
> https://github.com/openjdk/jdk/blob/adc3f53d2403cd414a91e71c079b4108b2346da0/make/RunTests.gmk#L723-L744
> 
> After [JDK-8348426](https://bugs.openjdk.org/browse/JDK-8348426), the AOT configuration file will change to a binary format and can no longer be edited this way. In preparation for [JDK-8348426](https://bugs.openjdk.org/browse/JDK-8348426), we should change the "JTREG_AOT_JDK=true" set up to run a single Java program that accomplishes the same effect as the current implementation.
> 
> ** Changes in this PR **
> 
> This PR combines the invocation of these Java tools into a single Java program, so we just have a single AOT configuration file. It also uses the `-XX:ExtraSharedClassListFile` option to include the default classlist from the JDK home directory,

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

  Review comments from @erikj79

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/23620/files
  - new: https://git.openjdk.org/jdk/pull/23620/files/b5ccc05d..3d25d75a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=23620&range=06
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=23620&range=05-06

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/23620.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23620/head:pull/23620

PR: https://git.openjdk.org/jdk/pull/23620