Set Default compression to VRAM uncompressed for LightmapGI

This increases the speed to be near instant and removes the perceived lightmap bake speed regression

We need to investigate the speed and quality issues with BPTC and re-enable compression when we can

scene/3d/lightmap_gi.cpp

@@ -163,7 +163,8 @@ Array LightmapGIData::_get_light_textures_data() const {
 		config->set_value("remap", "importer", "2d_array_texture");
 		config->set_value("remap", "type", "CompressedTexture2DArray");
 		if (!config->has_section_key("params", "compress/mode")) {
-			config->set_value("params", "compress/mode", 2); //user may want another compression, so leave it be
+			// User may want another compression, so leave it be, but default to VRAM uncompressed.
+			config->set_value("params", "compress/mode", 3);
 		}
 		config->set_value("params", "compress/channel_pack", 1);
 		config->set_value("params", "mipmaps/generate", false);