Add sort_version_list to fle_utils.

@aronasorman this a pre-req for https://github.com/fle-internal/ka-lite-central/pull/207
So... this gets a list of versions like `[0.12.0, 0.13.0]` correct? If so, maybe for the lambda function it's better to use `StrictVersion` rather than splitting the string into tuples.