RFR: 7420: Update Japanese translation for rules

[mohno007]

This PR updates/improves Japanese translation of rules and its descriptions.

## Update

* Update texts based on new commits to `messages.properties` made after the last update date of the `messages_ja.properties`.
	* Support a new placeholder format introduced in `Rule 2.0`.
	* Use Markdown style link.
	* Add translations for newly added texts.
* Update texts for translation correctness and understandability.
	* Fix some wordings for understandability. Especially usage of Japanese particle.
	* Add [Japanese counter word (助数詞)](https://en.wikipedia.org/wiki/Japanese_counter_word) for numeric value.

You can see decoded version of `messages_ja` using this script:


native2ascii -reverse core/org.openjdk.jmc.flightrecorder.rules.jdk/src/main/resources/org/openjdk/jmc/flightrecorder/rules/jdk/messages/internal/messages_ja.properties

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Commit messages:
 - fix copyright text
 - Update Japanese translation for rules

Changes: https://git.openjdk.java.net/jmc/pull/308/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=308&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7420
  Stats: 290 lines in 1 file changed: 89 ins; 4 del; 197 mod
  Patch: https://git.openjdk.java.net/jmc/pull/308.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/308/head:pull/308

PR: https://git.openjdk.java.net/jmc/pull/308