RFR: 8330846: Add stacks of mounted virtual threads to the HotSpot thread dump [v2]

[Inigo Mediavilla Saiz]

> Print the stack traces of mounted virtual threads when calling `jcmd <pid> Thread.print`.

Inigo Mediavilla Saiz has updated the pull request incrementally with one additional commit since the last revision:

  Remove duplicated Carrying statement and indent vthread stack

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19482/files
  - new: https://git.openjdk.org/jdk/pull/19482/files/1a75277e..ae690b25

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19482&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19482&range=00-01

  Stats: 12 lines in 2 files changed: 2 ins; 7 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/19482.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19482/head:pull/19482

PR: https://git.openjdk.org/jdk/pull/19482