RFR: 8246774: Record Classes (final) implementation [v7]

[Vicente Romero]

> Co-authored-by: Vicente Romero <vicente.romero at oracle.com>
> Co-authored-by: Harold Seigel <harold.seigel at oracle.com>
> Co-authored-by: Jonathan Gibbons <jonathan.gibbons at oracle.com>
> Co-authored-by: Brian Goetz <brian.goetz at oracle.com>
> Co-authored-by: Maurizio Cimadamore <maurizio.cimadamore at oracle.com>
> Co-authored-by: Joe Darcy <joe.darcy at oracle.com>
> Co-authored-by: Chris Hegarty <chris.hegarty at oracle.com>
> Co-authored-by: Jan Lahoda <jan.lahoda at oracle.com>

Vicente Romero has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains 15 commits:

 - Merge branch 'JDK-8246774' of https://github.com/vicente-romero-oracle/jdk into JDK-8246774
 - adding missing changes to some tests
 - Merge branch 'master' into JDK-8246774
 - modifiying @since from 14 to 16
 - Merge pull request #1 from ChrisHegarty/record-serial-tests
   
   Remove preview args from JDK tests
 - Remove preview args from ObjectMethodsTest
 - Remove preview args from record serialization tests
 - removing the javax.lang.model related code to be moved to a separate bug
 - 8246774: Record Classes (final) implementation
   
   Co-authored-by: Vicente Romero <vicente.romero at oracle.com>
   Co-authored-by: Harold Seigel <harold.seigel at oracle.com>
   Co-authored-by: Jonathan Gibbons <jonathan.gibbons at oracle.com>
   Co-authored-by: Brian Goetz <brian.goetz at oracle.com>
   Co-authored-by: Maurizio Cimadamore <maurizio.cimadamore at oracle.com>
   Co-authored-by: Joe Darcy <joe.darcy at oracle.com>
   Co-authored-by: Chris Hegarty <chris.hegarty at oracle.com>
   Co-authored-by: Jan Lahoda <jan.lahoda at oracle.com>
 - adding missing changes to some tests
 - ... and 5 more: https://git.openjdk.java.net/jdk/compare/d5be8294...482fedec

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

Changes: https://git.openjdk.java.net/jdk/pull/290/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=290&range=06
  Stats: 535 lines in 109 files changed: 32 ins; 278 del; 225 mod
  Patch: https://git.openjdk.java.net/jdk/pull/290.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/290/head:pull/290

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