gnu: Add python-clingraph.

* gnu/packages/potassco.scm (python-clingraph): New variable.

gnu: Separate potassco packages into their own module.

* gnu/packages/potassco.scm: New file.
* gnu/packages/maths.scm (libpotassco, clasp, clingo, python-clingo)
(python-telingo): Move to potassco module.  Adjust imports accordingly.
* gnu/packages/emacs-xyz.scm (emacs-pasp-mode): Move to potassco module.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add %D%/packages/potassco.scm.

gnu: Add mecab-unidic.

* gnu/packages/language.scm (mecab-unidic): New variable.

gnu: Add mecab-ipadic.

* gnu/packages/language.scm (mecab-ipadic): New variable.

gnu: Add mecab.

* gnu/packages/language.scm (mecab): New variable.
* gnu/packages/patches/mecab-variable-param.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu: libexif: Update home page.

* gnu/packages/photo.scm (libexif) [home-page]: Update URL.

gnu: python-gst: Update to 1.22.2.

* gnu/packages/gstreamer.scm (python-gst): Update to 1.22.2.

gnu: gst-editing-services: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-editing-services): Update to 1.22.2.

gnu: gst-libav: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-libav): Update to 1.22.2.

gnu: gst-plugins-ugly: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-plugins-ugly): Update to 1.22.2.

gnu: gst-plugins-bad: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-plugins-bad): Update to 1.22.2.

gnu: gst-plugins-good: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-plugins-good): Update to 1.22.2.

gnu: gst-plugins-base: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gst-plugins-base): Update to 1.22.2.

gnu: gstreamer: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gstreamer): Update to 1.22.2.

gnu: gstreamer-docs: Update to 1.22.2.

* gnu/packages/gstreamer.scm (gstreamer-docs): Update to 1.22.2.

gnu: python-trio-typing: Switch to pyproject-build-system.

* gnu/packages/python-xyz.scm (python-trio-typing) [source]: Fix indentation.
[build-system]: Use pyproject-build-system.
[arguments]: Delete field.

gnu: xpra: Remove input labels and use gexps.

* gnu/packages/xorg.scm (xpra) [inputs]: Remove labels.
[arguments]: Use gexps.  Remove trailing #t in phases.  Use search-input-file
and this-package-input in the fix-paths phase.  Use search-input-file in
wrap-program.

gnu: python-service-identity: Update to 21.1.0.

* gnu/packages/python-crypto.scm (python-service-identity): Update to 21.1.0.
[build-system]: Use pyproject-build-system.
[native-inputs]: New field.
[propagated-inputs]: Remove python-pyopenssl.  Add python-cryptography and
python-six.

gnu: python-pyopenssl: Update to 23.1.1.

* gnu/packages/python-crypto.scm (python-pyopenssl): Update to 23.1.1.
[source]: Remove patches.
[arguments]: Update faketime date in check phase.
Normalize pytest invocation in check phase override.
[propagated-inputs]: Remove python-six.

gnu: python-cryptography: Update to 40.0.1 [fixes CVE-2023-23931].

* gnu/packages/python-crypto.scm (python-cryptography-vectors): Delete
variable.
(python-cryptography-vectors-next): Rename to...
(python-cryptography-vectors): ... this.  Update to 40.0.1.
(python-cryptography): Delete variable.
(python-cryptography-next): Rename to...
(python-cryptography): ... this.  Update to 40.0.1.
[build-system]: Use pyproject-build-system.
[arguments]: Remove #:imported-modules and #:modules arguments.  Remove check
phase override.  Remove adjust-pyo3-requirement and configure-cargo phases.
Add disable-rust-extension-build and symlink-rust-library phases.
[native-inputs]: Replace python-cryptography-vectors-next with
python-cryptography-vectors.  Add python-iso8601.  Remove python-pytz.
Replace python-pytest with python-pytest-7.1.  Remove rust, rust:cargo and
python-setuptools-rust.
[inputs]: Remove all inputs.  Add python-cryptography-rust.
[propagated-inputs]: Remove python-asn1crypto, python-six, python-idna and
python-iso8601.
[description]: Start description with @code to avoid a lint warning.