[jdk18u] RFR: 8279445: Update JMH devkit to 1.34

[Aleksey Shipilev]

Clean backport to improve testing.

Additional tests:
 - [x] JMH devkit creation works
 - [x] Sample benchmarks work

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Commit messages:
 - Backport 0f98efbf2f0e47bb398fe7ca5235853e1d98df3a

Changes: https://git.openjdk.java.net/jdk18u/pull/8/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=8&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279445
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/8.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/8/head:pull/8

PR: https://git.openjdk.java.net/jdk18u/pull/8