add glsl feature for bevy_pbr (#13516)

# Objective

in bevy_pbr we check for `shader_format_glsl` before using binding
arrays due to a naga->glsl limitation. but the feature is currently only
enabled for the bevy_render crate.

fix #13232

## Solution

enable the feature for bevy_pbr too.

---------

Co-authored-by: Alice Cecile <[email protected]>

crates/bevy_internal/Cargo.toml

@@ -62,7 +62,10 @@ symphonia-vorbis = ["bevy_audio/symphonia-vorbis"]
 symphonia-wav = ["bevy_audio/symphonia-wav"]
 
 # Shader formats
-shader_format_glsl = ["bevy_render/shader_format_glsl"]
+shader_format_glsl = [
+  "bevy_render/shader_format_glsl",
+  "bevy_pbr?/shader_format_glsl",
+]
 shader_format_spirv = ["bevy_render/shader_format_spirv"]
 
 serialize = [