bug#59720: 30.0.50; python-ts-mode: match/case is not fontified properly

[Mickey Petersen <mickey@masteringemacs.org>]

1. Visit a python file. It will use the regular python mode.
2. Write:

    def foo():
         match foo:
             case 10:
                 pass

3. It is highlighted correctly: match and case are fontified with `font-lock-keyword-face'.
4. Type M-x python-ts-mode.
5. Highlighting is now off for match/case. Text properties for the `m' character are:

    Character code properties: customize what to show
      name: LATIN SMALL LETTER M
      general-category: Ll (Letter, Lowercase)
      decomposition: (109) ('m')
      uppercase: 77 (M)
      titlecase: 77 (M)

    There are text properties here:
      fontified            t




In GNU Emacs 30.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version
 3.24.20, cairo version 1.16.0) of 2022-11-29 built on mickey-work
Repository revision: 7939184f8e0370e7a3397d492812c6d202c2a193
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.3 LTS

Configured using:
 'configure --with-native-compilation --with-json --with-mailutils
 --without-compress-install --with-imagemagick CC=gcc-10'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2
M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE
XIM XINPUT2 XPM GTK3 ZLIB
Important settings:
  value of $LC_MONETARY: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: EL


Memory information:
((conses 16 1470611 151650)
 (symbols 48 83975 12)
 (strings 32 412115 14879)
 (string-bytes 1 12040593)
 (vectors 16 146926)
 (vector-slots 8 3669783 89353)
 (floats 8 829 511)
 (intervals 56 18032 4083)
 (buffers 992 58))