Update request: gnugrep 3.7 → 3.10

[wegank]

• Package name: gnugrep
• Latest released version: 3.10

• Current version on the unstable channel: 3.7
• Current version on the stable/release channel: 3.7

• Checked the nixpkgs pull requests

Notify maintainers

@edolstra @m00wl

Also, @trofi for the last version bump.

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Note for maintainers: Please tag this issue in your PR.

[trofi]

I think the (minor) challenge of the new version if a new pcre2 dependency in gzip (instead of old pcre). Will need a minor but careful careful tweaking of bootstrapTools to package the library safely:

* Noteworthy changes in release 3.8 (2022-09-02) [stable]

** Changes in behavior

  The -P option is now based on PCRE2 instead of the older PCRE,
  thanks to code contributed by Carlo Arenas.