Merge bitcoin/bitcoin#26077: guix: switch from `guix environment` to `guix shell`

66c4b58e518aff08030b3c879c44af7716110619 guix: switch from guix environment to guix shell (fanquake)

Pull request description:

  See https://guix.gnu.org/manual/devel/en/html_node/Invoking-guix-environment.html.

  > Deprecation warning: The guix environment command is deprecated
  in favor of guix shell, which performs similar functions but is more convenient to use. See Invoking guix shell.

  > Being deprecated, guix environment is slated for eventual removal,
  but the Guix project is committed to keeping it until May 1st, 2023. Please get in touch with us at guix-devel@gnu.org if you would like to discuss it.

  See also https://guix.gnu.org/blog/2021/from-guix-environment-to-guix-shell/ for a blog post and additional details.

  Guix `shell` was added to Guix ~1 year ago, in this commit, https://git.savannah.gnu.org/cgit/guix.git/commit/?id=80edb7df6586464aa40e84e103f0045452de95db, which isn't part of the 1.3.0 release binaries out of the box, but invoking a `guix pull`, and updating will make it available. i.e:
  ```bash
  bash-5.1# guix --version
  guix (GNU Guix) 1.3.0
  Copyright (C) 2021 the Guix authors
  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
  This is free software: you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.

  bash-5.1# guix shell
  guix: shell: command not found
  Try 'guix --help' for more information.

  bash-5.1# guix pull
  Updating channel 'guix' from Git repository at 'https://git.savannah.gnu.org/git/guix.git'...
  Authenticating channel 'guix', commits 9edb3f6 to 7a980bb (6,278 new commits)...
  Building from this channel:
    guix      https://git.savannah.gnu.org/git/guix.git7a980bb
  < snip >
  building /gnu/store/2wwwsczxcw61m05p4mv0kf0advx4fqsb-inferior-script.scm.drv...
  building package cache...
  building profile with 1 package...
  New in this revision:
    6,866 new packages: a2jmidid, abjad,

  bash-5.1# guix help shell
  Usage: guix shell [OPTION] PACKAGES... [-- COMMAND...]
  Build an environment that includes PACKAGES and execute COMMAND or an
  interactive shell in that environment.
  ```

ACKs for top commit:
  TheCharlatan:
    ACK 66c4b58e518aff08030b3c879c44af7716110619

Tree-SHA512: caa3fd2ca8d0f261c50ecdda3728a75389d24d89b51293dedc704ee77ab1342b2bb08ca8c871dcb4646229f056ec86cb15500934ded1b0c501a3ffc25aaa8ae6

0 files changed, 0 insertions, 0 deletions