RFR: 8308753: Class-File API transition to Preview [v13]

[Adam Sotona]

> Classfile API is an internal library under package `jdk.internal.classfile` in JDK 21.
> This pull request turns the Classfile API into a preview feature and moves it into `java.lang.classfile`.
> It repackages all uses across JDK and tests and adds lots of missing Javadoc.
> 
> This PR goes in sync with [JDK-8308754](https://bugs.openjdk.org/browse/JDK-8308754): Class-File API (Preview) (CSR)
> and [JDK-8280389](https://bugs.openjdk.org/browse/JDK-8280389): Class-File API (Preview) (JEP).
> 
> Online javadoc is available at: 
> https://cr.openjdk.org/~asotona/JDK-8308753-preview/api/java.base/java/lang/classfile/package-summary.html
> 
> In addition to the primary transition to preview, this pull request also includes:
> - All Classfile* classes ranamed to ClassFile* (based on JEP discussion).
> - A new preview feature, `CLASSFILE_API`, has been added.
> - Buildsystem tool required a little patch to support annotated modules.
> - All JDK modules using the Classfile API are newly participating in the preview.
> - All tests that use the Classfile API now have preview enabled.
> - A few Javac tests not allowing preview have been partially reverted; their conversion can be re-applied when the Classfile API leaves preview mode.
> 
> Despite the number of affected files, this pull request is relatively straight-forward. The preview version of the Classfile API is based on the internal version of the library from the JDK master branch, and there are no API features added.
> 
> Please review this pull request to help the Classfile API turn into a preview.
> 
> Any comments are welcome.
> 
> Thanks,
> Adam

Adam Sotona has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 336 commits:

 - Merge branch 'master' into JDK-8308753-preview
 - Update src/java.base/share/classes/jdk/internal/org/objectweb/asm/ClassReader.java
   
   Co-authored-by: ExE Boss <3889017+ExE-Boss at users.noreply.github.com>
 - fixed case in the test text
 - fixing javadoc
 - Unified implementations of InvokeInstruction::count, fixed javadoc and javap CodeWriter
 - Update src/java.base/share/classes/java/lang/classfile/instruction/InvokeInstruction.java
   
   Co-authored-by: Maurizio Cimadamore <54672762+mcimadamore at users.noreply.github.com>
 - fixing javadoc
 - fixing javadoc
 - fixing javadoc
 - Apply suggestions from code review
   
   Co-authored-by: Maurizio Cimadamore <54672762+mcimadamore at users.noreply.github.com>
 - ... and 326 more: https://git.openjdk.org/jdk/compare/d4c904d8...ef2305d8

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Changes: https://git.openjdk.org/jdk/pull/15706/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15706&range=12
  Stats: 29011 lines in 759 files changed: 13016 ins; 12505 del; 3490 mod
  Patch: https://git.openjdk.org/jdk/pull/15706.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15706/head:pull/15706

PR: https://git.openjdk.org/jdk/pull/15706