### Godot version

master CI builds

### System information

Linux / Editor with doubles and GCC sanitizers

### Issue description

The `Linux / Editor with doubles and GCC sanitizers` build can fail with a `attempting free on address which was not malloc()-ed` crash in the `Open and close editor (Vulkan)` step.

https://github.com/godotengine/godot/actions/runs/5366302204/jobs/9735786296#step:15:138
https://github.com/godotengine/godot/actions/runs/5389199469/jobs/9783070708?pr=78740#step:15:138

The failure doesn't seem related to either PR (in fact one of them is just a docs change). I have only seen this issue these two times, still probably worth looking into.

### Steps to reproduce

Open and close https://github.com/godotengine/regression-test-project/archive/4.0.zip using the Vulkan renderer.

### Minimal reproduction project

https://github.com/godotengine/regression-test-project/archive/4.0.zip
if (!is_instance_extension_enabled(VK_EXT_DEBUG_UTILS_EXTENSION_NAME)) {
		return;
	}
	CharString cs = p_label_name.utf8();
	VkDebugUtilsLabelEXT label;
	label.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_LABEL_EXT;
	label.pNext = nullptr;
	label.pLabelName = cs.get_data();
	label.color[0] = p_color[0];
	label.color[1] = p_color[1];
	label.color[2] = p_color[2];
	label.color[3] = p_color[3];
	CmdBeginDebugUtilsLabelEXT(p_command_buffer, &label);
}
void VulkanContext::command_insert_label(VkCommandBuffer p_command_buffer, String p_label_name, const Color p_color) {
	if (!is_instance_extension_enabled(VK_EXT_DEBUG_UTILS_EXTENSION_NAME)) {
		return;
	}
	CharString cs = p_label_name.utf8();
	VkDebugUtilsLabelEXT label;
	label.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_LABEL_EXT;
	label.pNext = nullptr;
	label.pLabelName = cs.get_data();
	label.color[0] = p_color[0];
	label.color[1] = p_color[1];
	label.color[2] = p_color[2];
	label.color[3] = p_color[3];
	CmdInsertDebugUtilsLabelEXT(p_command_buffer, &label);
}
void VulkanContext::command_end_label(VkCommandBuffer p_command_buffer) {