Preserve geometry when transforming CZML entities

CZML entities like boxes can be optimized so that they don't recreate their geometry during translation/rotation/scale animations. This would help speed up czmls containing a large number these entities.

[Example CZML](https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/#c=tVVdT9swFP0rUV/opOLaiVM7UNBQQRpaWRntJg2CkJsY8HDiynHKx8R/n5OmJWm7TTwsD3bic++51+f6OnOmneglkc6BcxWmjvOrGBwnbIk4bO3ZOVZRnvDUhK3OEppznQmVLnAEYA2KpIoeCqDiKZlSw/WcyYW9CxHdhWQXBRPk7yG6B+Fld2PRg5cr1pI319omMREJ/zNNwyPJpREzKbguHPwaoll6V7EMR6Pzm/FkdN5wzQyfLfDxj/Hk5OxmMBwNPt+cfRtOTs+HpycXYWth/FpMr52tuk00ix54PJr+5FFdvKl6CltOTaBiMbb7SgtNs3Ws2j7ThmeClZpfYVg8AHYcb/XmV2/Xb66vnXqIWyFlSX7LZMYbkMqNFCkvUaPzreBASaW3J6fvpqxErlzf7zjlAMu5nkyl2EqHmcqEqU7R+mGZKckK7EjeKS3MfVJV6/TLydFFo1S3Sj8yHZ88Gc2WXpPnWVXeT6PhcfMYNXSsb/Mf58lxXBf1PEyBHV2vhyHxauAuJl6JBj4lxMcE1UAMKXIpBr7v0oC6MPA7f43srUVGReReAJDrBhhjFJCNyIQA3CMIEoTpemQMAaUUU59AsoSu16thZbbtxbYUJE+F+ZozW5W0At+nGwQepBgi5Hkk8GgQBE3QRZYBQdclELm9Xn1rEGCf+hC7KKA2eRy4uOFLerTn2b35hCLP2rxP1v+WGNpIbF328toI0+v9MA3Tub2B54I/cm3v4JQ/OgN7QvMEfC/X2jtR+TlQtjy2D/VOZ1md7F7lMj5KRWKrU7VumL5+2F9wxsywscp1xM+1SkTGLX1FPbAX/vEKBlKxuF38BErXMix4884Ai+P2BlvN9kWpZKK2mbQ6rX5mniU/XKT8USQzpY2Ta9kGoGt4MrM9y7PuNLeXpQFRlhW8/e7SqR+LuSPiA9u6TRnshRNJlmUWuc2lHIsX2/OH/a61b7gVexPp3cj+syR7Lkzu0eFwsQgA6Hft56aXUUpOma4x/gY) - you can check in the debugger that a new `BoxOutlineGeometry` is created per frame.

Open the linked Example CZML and use the debugger to trace why a new BoxOutlineGeometry is created for each frame during translation, rotation, or scale animations. Done means geometry is preserved and reused across frames for optimizable entities, with the example no longer recreating that geometry each frame.

Written by the indexing model from the issue text.