opengl: add debug:gl_debugging (#13183)

add debug:gl_debugging so we can disable gl debugging entirerly,
both glGetError and enabling EGL_KHR_debug has its cost, we still have
EXT_create_context_robustness and glGetGraphicsResetStatus that should
catch context loss, and is generally cheap to call it only checks a flag
set.

glGetError might cause a implicit flush to get any pending calls sent to
the gpu.

however to get EGL_KHR_debug back enabled we now require a restart of
the compositor after changing debug:gl_debugging

src/config/ConfigDescriptions.hpp

@@ -1752,6 +1752,12 @@ inline static const std::vector<SConfigOptionDescription> CONFIG_OPTIONS = {
         .type        = CONFIG_OPTION_BOOL,
         .data        = SConfigOptionDescription::SBoolData{false},
     },
+    SConfigOptionDescription{
+        .value       = "debug:gl_debugging",
+        .description = "enable OpenGL debugging and error checking, they hurt performance.",
+        .type        = CONFIG_OPTION_BOOL,
+        .data        = SConfigOptionDescription::SBoolData{false},
+    },
     SConfigOptionDescription{
         .value       = "debug:disable_logs",
         .description = "disable logging to a file",