codec2json: Fix plugin loading on Windows

* Library versioning should not be used for plugins since it will add
  -{version}.dll suffix (and versioned libraries on Linux with symlink).
  Then the library file name and plugin init function name mismatch
  will result in blacklisted plugin.

* Don't define BUILDING_GST_CODECS, makes no sense

* Don't define G_LOG_DOMAIN, which should be used only for libraries,
  not plugins

* Depends on gstcodecparsers libary, not gstcodecs.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5249>

subprojects/gst-plugins-bad/ext/codec2json/meson.build

@@ -6,8 +6,6 @@ codec2json_sources = files([
 
 cp_args = [
   '-DGST_USE_UNSTABLE_API',
-  '-DBUILDING_GST_CODECS',
-  '-DG_LOG_DOMAIN="GStreamer-Codec2json"'
 ]
 
 json_dep = dependency('json-glib-1.0', version : '>=1.6.6', fallback : ['json-glib', 'json_glib_dep'], required: get_option('codec2json'))
@@ -17,12 +15,9 @@ if json_dep.found()
     codec2json_sources,
     c_args : gst_plugins_bad_args + cp_args,
     include_directories : [configinc],
-    version : libversion,
-    soversion : soversion,
-    darwin_versions : osxversion,
     install : true,
     install_dir : plugins_install_dir,
-    dependencies : [gstvideo_dep, gstcodecs_dep, json_dep],
+    dependencies : [gstvideo_dep, gstcodecparsers_dep, json_dep],
   )
   plugins += [gstcodec2json]
 endif