RFR: 8309602: update JVMTI history table for jdk 21 [v2]

[Serguei Spitsyn]

> This is a minor update of the `jvmti.xml` file.
> The JVM TI history table needs to be updated to list new capability, functions and events added to support virtual threads as a permanent feature in JDK 21. Also, it should list a minor update with the `Implementation Note` that dynamic loading of agents into a running VM is now specified to print a warning (JEP 451).
> The JVM TI history table is maintained for convenience only and does not require a CSR.

Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:

  review: simplified the latest history entries

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14352/files
  - new: https://git.openjdk.org/jdk/pull/14352/files/cb95bf11..a9e4f8eb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14352&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14352&range=00-01

  Stats: 15 lines in 1 file changed: 0 ins; 13 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14352.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14352/head:pull/14352

PR: https://git.openjdk.org/jdk/pull/14352