[BUG] rapids-colab.sh script fails to properly install the libraries in several instances

[taureandyernv]

Describe the bug
Colab script has several new issues:

1. when installing 0.11 nightlies, cudf is installed as =.10
2. when installed a stable release, like 0.10, the script fails
3. when installing xgboost, the script fails with a 404 error
4. when all libraries are installed in 0.11, cudf and cugraph throw Attribute errors around features that have been removed for 0.11

• cudf errror: AttributeError: type object 'cudf._lib.gpuarrow.CudaRecordBatchStreamReader' has no attribute '__reduce_cython__', which was removed in https://github.com/rapidsai/cudf/commit/e5192de83d7d3a568796cadfdd4159236d6ec665
• cugraph error: AttributeError: module 'pyarrow.lib' has no attribute 'LargeListType'

[taureandyernv]

Creating a PR for fixing 1,2, and 3 #233. May do a quick merge to get users working in Colab with v0.10 and we can fix 0.11 after. Thoughts @randerzander ?