RFR: 8277370: configure script cannot distinguish WSL version [v2]

[Yasumasa Suenaga]

> configure script distinguish WSL version if it is run on WSL. It is assumed WSL 2 if `/run/WSL` exists.
> However it exists in spite of WSL 1 on Windows 11 at least. We need to check it with other method.
> 
> The method to distinguish WSL version has been discussed on https://github.com/microsoft/WSL/issues/4555 , however they do not seem to get consensus about it. `/run/WSL` was introduced in it, but I think `Hyper-V` in `/proc/interrupt` is more robustness because WSL 2 is run on Hyper-V. https://docs.microsoft.com/en-us/windows/wsl/faq#does-wsl-2-use-hyper-v--will-it-be-available-on-windows-10-home-

Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:

  Use $GREP to check /proc/interrupts

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6446/files
  - new: https://git.openjdk.java.net/jdk/pull/6446/files/5f58daa3..13f1f8b9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6446&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6446&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6446.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6446/head:pull/6446

PR: https://git.openjdk.java.net/jdk/pull/6446