RFR: 8342035: jlink plugins for setting java.vendor, java.vm.vendor and java.vendor.url [v4]

[Henry Jen]

> Add jlink plugins to allow branding change for java.vendor, java.vm.vendor and java.vendor.url.
> 
> The jlink plugin will change the value in java.lang.VersionProps, which will set those property values. The `java.vm.vendor` was initialized by VM with value set at build time, and then later be replaced with value from VersionProps.
> 
> To keep current behavior, we treat 'N/A' value as no-op to mimic current build behavior. Perhaps we don't really need this, as proper value should be set with `branding.conf` in official build.

Henry Jen has updated the pull request incrementally with one additional commit since the last revision:

  Clean up adapting review comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21964/files
  - new: https://git.openjdk.org/jdk/pull/21964/files/c07b4e4f..eeeb7181

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21964&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21964&range=02-03

  Stats: 12 lines in 4 files changed: 0 ins; 5 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/21964.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21964/head:pull/21964

PR: https://git.openjdk.org/jdk/pull/21964