RFR: CODETOOLS-7903487: JMH: Cover JMH profilers with basic tests [v4]

[Aleksey Shipilev]

> JMH profilers is the important feature, and they should be verified with at least smoke tests to capture their breakage, e.g. when JDK changes something.

Aleksey Shipilev has updated the pull request incrementally with three additional commits since the last revision:

 - Treat IPC/CPI metrics as optional for perf profiler
 - PerfAsm profilers should target a native stub
 - Print message when profiler cannot be enabled for the test

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Changes:
  - all: https://git.openjdk.org/jmh/pull/109/files
  - new: https://git.openjdk.org/jmh/pull/109/files/0847cab0..d4eff046

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=109&range=03
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=109&range=02-03

  Stats: 144 lines in 7 files changed: 75 ins; 55 del; 14 mod
  Patch: https://git.openjdk.org/jmh/pull/109.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/109/head:pull/109

PR: https://git.openjdk.org/jmh/pull/109