gnu: python-charset-normalizer-3: Mark as deprecated.

This is a followup to bbb9551884.

Replace all python-charset-normalizer-3 occurences
with python-charset-normalizer.

* gnu/packages/python-xyz.scm (python-charset-normalizer-3):
  Mark as a deprecated public alias.
* gnu/packages/music.scm (picard)
  [inputs]: Replace python-charset-normalizer-3
  with python-charset-normalizer.
* gnu/packages/python-web.scm (python-translation-finder)
  [propagated-inputs]: Replace python-charset-normalizer-3
  with python-charset-normalizer.

Change-Id: Ib45bfe24efde2f2a6435c0c272d9d14e70e2321e
Reviwed-by: Ludovic Courtès <ludo@gnu.org>
Signed-off-by: Sharlatan Hellseher <sharlatanus@gmail.com>

gnu/packages/music.scm

@@ -4052,7 +4052,7 @@ event-based scripts for scrobbling, notifications, etc.")
      (list gettext-minimal python-dateutil))
     (inputs
      (list chromaprint
-           python-charset-normalizer-3
+           python-charset-normalizer
            python-discid
            python-pyqt
            python-mutagen

gnu/packages/python-web.scm

@@ -8619,7 +8619,7 @@ for HTTP/2 is planned.")
      (list python-pytest
            python-setuptools))
     (propagated-inputs
-     (list python-charset-normalizer-3
+     (list python-charset-normalizer
            python-ruamel.yaml
            python-weblate-language-data))
     (home-page "https://weblate.org/")

gnu/packages/python-xyz.scm

@@ -19853,7 +19853,8 @@ taking a new approach.  All IANA character set names for which the Python core
 library provides codecs are supported.")
     (license license:expat)))
 
-(define-public python-charset-normalizer-3 python-charset-normalizer)
+(define-deprecated/public-alias python-charset-normalizer-3
+  python-charset-normalizer)           ;may be removed after 2025-12-01
 
 (define-public python-docopt
   (package