RFR: 8080: Add support for enabling jfr on native images [v2]

[Alex Macdonald]

> This PR addresses JMC-8080 [[0]](https://bugs.openjdk.org/browse/JMC-8080), in which it would be nice to add support for enabling flight recorder on GraalVM native images.
> 
> Currently, trying to use the flight recording wizard on a connected native image ends up with an error dialog:
> ![native-image](https://github.com/openjdk/jmc/assets/10425301/a04b49db-922c-451e-89d8-0cc951e3bbda)
> 
> The proposed solution here adds checks to determine if the vm is of type Substrate VM, and check if there is a flightrecording mbean registered.
> 
> [0] https://bugs.openjdk.org/browse/JMC-8080

Alex Macdonald has updated the pull request incrementally with one additional commit since the last revision:

  fix typos

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

Changes:
  - all: https://git.openjdk.org/jmc/pull/491/files
  - new: https://git.openjdk.org/jmc/pull/491/files/515e4b9b..6b658b78

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=491&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=491&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jmc/pull/491.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/491/head:pull/491

PR: https://git.openjdk.org/jmc/pull/491