RFR: 8339810: Cleanup the code in sun.tools.jar.Main to properly close resources and use ZipFile during extract

[Jaikiran Pai]

Can I please get a review of this change which proposes to address https://bugs.openjdk.org/browse/JDK-8339810?

As noted in the issue we have a few places in the jar's tool `Main` class where we currently don't close the resources in a try/finally block. The commit in this PR updates the relevant places to use a try-with-resources. Additionally, in the extract() implementation of the `Main` class, we use the `ZipFile` when a JAR file is being extracted. This matches with what we do in the rest of the code in that `Main` class where a jar tool operation is a being run against a file.

No new test has been added given the nature of this change and existing tests in `test/jdk/tools/jar` continue to pass with this change. tier1, tier2 and tier3 testing is currently in progress.

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Commit messages:
 - 8339810: Cleanup the code in sun.tools.jar.Main to properly close resources and use ZipFile during extract

Changes: https://git.openjdk.org/jdk/pull/20928/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20928&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339810
  Stats: 177 lines in 1 file changed: 32 ins; 53 del; 92 mod
  Patch: https://git.openjdk.org/jdk/pull/20928.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20928/head:pull/20928

PR: https://git.openjdk.org/jdk/pull/20928