RFR: 8328821: Map.of() derived view collection mutators should throw UnsupportedOperationException [v9]

[Liam Miller-Cushon]

> This change overrides mutator methods in the implementation returned by `Map.of().entrySet()` to throw `UnsupportedOperationException`.

Liam Miller-Cushon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 13 additional commits since the last revision:

 - Merge remote-tracking branch 'origin/master' into JDK-8328821-make-clear-consistent
 - Merge remote-tracking branch 'origin/master' into JDK-8328821-make-clear-consistent
 - Update test/jdk/java/util/Collection/MOAT.java
   
   Co-authored-by: Chen Liang <liach at openjdk.org>
 - Update copyright year
   
   and add the bug number to the modified test
 - Update unmodifiable map javadoc
 - Also throw UOE for mutators on keySet() and values()
   
   and add more test coverage to MOAT.
 - Merge remote-tracking branch 'origin/master' into JDK-8328821-make-clear-consistent
 - Merge remote-tracking branch 'origin/master' into JDK-8328821-make-clear-consistent
 - Check m.entrySet().hashCode() in MOAT
 - Merge remote-tracking branch 'origin/master' into JDK-8328821-make-clear-consistent
 - ... and 3 more: https://git.openjdk.org/jdk/compare/1522f869...d83ca7f3

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18522/files
  - new: https://git.openjdk.org/jdk/pull/18522/files/223164c4..d83ca7f3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18522&range=08
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18522&range=07-08

  Stats: 317645 lines in 8435 files changed: 178168 ins; 107048 del; 32429 mod
  Patch: https://git.openjdk.org/jdk/pull/18522.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18522/head:pull/18522

PR: https://git.openjdk.org/jdk/pull/18522