RFR: Specify explicitly jmh-generator-annprocess as an annotation processor in jmh-samples pom.xml

[Fabrice Bibonne]

When building **with maven** jmh-samples with a jdk version 22+ , the annotation processor jmh-generator-annprocess is not executed and files and classes generated by jmh are not included in the jar. Then there is an error at runtime when trying to execute samples with command line such as `java -jar target/benchmarks.jar JMHSample_01` : `Exception in thread "main" java.lang.RuntimeException: ERROR: Unable to find the resource: /META-INF/BenchmarkList` 

This error happens because the jmh-sample pom.xml does not explicitly set jmh-generator-annprocess as an annotation processor path. This PR aims to correct this issue like the PR #125

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Commit messages:
 - fix (samples with java > 22)

Changes: https://git.openjdk.org/jmh/pull/165/files
  Webrev: https://webrevs.openjdk.org/?repo=jmh&pr=165&range=00
  Stats: 13 lines in 1 file changed: 7 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jmh/pull/165.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/165/head:pull/165

PR: https://git.openjdk.org/jmh/pull/165