RFR: 8173970: jar tool should have a way to extract to a directory [v12]

[Jaikiran Pai]

> Can I please get a review for this patch which proposes to implement the enhancement request noted in https://bugs.openjdk.java.net/browse/JDK-8173970?
> 
> Edit: This PR description has now been updated to match the changes that were done over the course of review inputs that were received for this enhancement.
> 
> The commit in this PR introduces the ability to use `jar` tool to extract the contents of the JAR file to a specific directory of choice. Optional `-C` and `--dir` options are added to the `-x` main operation of the jar tool. The value for these options is expected to be a file path which is expected to be a directory to which the jar will be extracted. When neither `-C` nor `--dir` are used, the extract operation of the jar tool will continue to behave like it did before this enhancement and will extract the jar into the current working directory.
> 
> The commit also includes a jtreg testcase which verifies the usage of this new option.

Jaikiran Pai has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 23 commits:

 - Christian's suggestion - keep OTHER as the last enum value
 - merge latest from master branch
 - merge latest from master branch
 - merge latest from master branch
 - merge latest from master branch
 - merge latest from master branch
 - merge latest from master branch
 - merge latest from master branch
 - cleanup testExtractNoDestDirWithPFlag() test
 - merge latest from master branch
 - ... and 13 more: https://git.openjdk.org/jdk/compare/20f36c66...73f6d6e7

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Changes: https://git.openjdk.org/jdk/pull/2752/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=2752&range=11
  Stats: 567 lines in 4 files changed: 558 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/2752.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/2752/head:pull/2752

PR: https://git.openjdk.org/jdk/pull/2752