Vendorize draco submodule (#5933)

Add submodule projects/gl-native/vendor/draco from
1af95a20b81624f64c4b19794cb3ca991e6d0a76.

The original submodule size is ~138.00 MB, which may result in
slower checkout times in CI.

cc @mapbox/sdk-ci
cc @mapbox/gl-native

cc @mapbox/maps-android
cc @mapbox/maps-ios

GitOrigin-RevId: f4b919c1bb57dc15d8b29bd4ef1c4ff37f268e13

Author: temap

LICENSE.md

@@ -1299,7 +1299,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ---
 
-### draco,1.5.3,Apache-2.0,Google,https://github.com/google/draco
+### draco,1.5.7,Apache-2.0,Google,https://github.com/google/draco
 
 ```
                                  Apache License