RFR: 8359064: Expose reason for marking nmethod non-entrant to JVMCI client [v2]

[Cesar Soares Lucas]

> We recently introduced a way to set the reason why a nmethod was being marked as `not entrant`, see [here](https://github.com/openjdk/jdk/pull/23980) and [here](https://github.com/openjdk/jdk/pull/25338).
> 
> This PR is to expose in the JVMCI interface the reason why the nmethod was flagged as `not entrant`. This will allow JVMCI-based compilers to implement heuristics to handle re-compilations differently based on what happened to earlier versions of a method, for instance, this will likely be used to address this [RFE in Truffle](https://github.com/oracle/graal/issues/11045
> ). 
> 
> Tested on Linux x86_64, ARM with JTREG tier 1-3.

Cesar Soares Lucas has updated the pull request incrementally with one additional commit since the last revision:

  Address PR feedback: add comments, refactor enum definition in the Java side.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/25706/files
  - new: https://git.openjdk.org/jdk/pull/25706/files/9478d1de..5e4b8145

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25706&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25706&range=00-01

  Stats: 83 lines in 5 files changed: 76 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/25706.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25706/head:pull/25706

PR: https://git.openjdk.org/jdk/pull/25706