RFR: 8364182: Add jcmd VM.properties command [v4]

[Kieran Farrell]

> The goal of this PR is to add a means of exposing security properties at runtime to aid the debugging security related issues/misconfigurations etc. Currently, only initial security properties set at start up can be exposed via the `InitialSecurityProperty` JFR event. 
> 
> This patch introduces a new jcmd diagnostic command `VM.properties`, which enables developers to print either the current system properties or security properties of a running Java process via command-line arguments (-system or -security). To avoid clutter within the jcmd command list, the old `VM.system_properties` command is hidden, but not removed so will not break existing usages. The implementation of each is shared to reduce duplication.

Kieran Farrell has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:

 - merge
 - rm unused code
 - Merge remote-tracking branch 'origin/master' into sec_props2
 - static helper method for both jcmd calls
 - missing )
 - working with single arg
 - updates
 - update args
 - two args -not yet tested
 - initial patch

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Changes: https://git.openjdk.org/jdk/pull/29124/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29124&range=03
  Stats: 29 lines in 6 files changed: 29 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29124.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29124/head:pull/29124

PR: https://git.openjdk.org/jdk/pull/29124