gst_all_1: Disable GLIB_DEBUG

`glib_debug` option (`gobject-cast-checks` prior to 1.26) defaults to `auto`, which would result in the cast checks being disabled on stable versions, if we did not use `-Dauto_features=enabled`. Let’s disable the option as it is meant to be on stable releases: https://gitlab.gnome.org/GNOME/glib/-/blob/main/docs/macros.md#g_enable_debug

Also remove option disabling `glib_asserts`. It was introduced in 800ceaf1bd to remove references to `dev` output caused by `__FILE__` used in assertions but they no longer seem to appear. While the option supported the `auto` means disabled on stable versions feature, the option was actually enabled by default, so the comment was incorrect.

pkgs/development/libraries/gstreamer/bad/default.nix

@@ -277,7 +277,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   mesonFlags = [
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
-    "-Dglib_assert=false" # asserts should be disabled on stable releases
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
 
     "-Damfcodec=disabled" # Windows-only
     "-Dandroidmedia=disabled" # Requires Android system.

pkgs/development/libraries/gstreamer/base/default.nix

@@ -119,6 +119,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
     # See https://github.com/GStreamer/gst-plugins-base/blob/d64a4b7a69c3462851ff4dcfa97cc6f94cd64aef/meson_options.txt#L15 for a list of choices
     "-Dgl_winsys=${lib.concatStringsSep "," (lib.optional enableX11 "x11" ++ lib.optional enableWayland "wayland" ++ lib.optional enableCocoa "cocoa")}"

pkgs/development/libraries/gstreamer/core/default.nix

@@ -102,6 +102,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
     "-Ddbghelp=disabled" # not needed as we already provide libunwind and libdw, and dbghelp is a fallback to those
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
     (lib.mesonEnable "ptp-helper" withRust)

pkgs/development/libraries/gstreamer/good/default.nix

@@ -166,7 +166,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   mesonFlags = [
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
-    "-Dglib_assert=false" # asserts should be disabled on stable releases
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
     (lib.mesonEnable "doc" enableDocumentation)
   ] ++ lib.optionals (!qt5Support) [
     "-Dqt5=disabled"

pkgs/development/libraries/gstreamer/rtsp-server/default.nix

@@ -47,6 +47,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
     (lib.mesonEnable "doc" enableDocumentation)
   ];

pkgs/development/libraries/gstreamer/ugly/default.nix

@@ -68,6 +68,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   mesonFlags = [
+    "-Dglib_debug=disabled" # cast checks should be disabled on stable releases
     "-Dsidplay=disabled" # sidplay / sidplay/player.h isn't packaged in nixpkgs as of writing
     (lib.mesonEnable "doc" enableDocumentation)
   ] ++ (if enableGplPlugins then [