Improve Version Sorting in Snippets

[stanbrub]

Versions for Deephaven look like 0.28.0, 0.28.1, etc. That style is not lexicographical sort-able. For some queries used for generating tables using the Benchmark snippets, sorting by version is important. Sorting by timestamp is not reliable, because it's possible that a re-run of a specific release will be needed, which would put the timestamps out of order.

• Write a function to convert version to something sortable
• Add it inline for the version column being sorted (since benchmark data is small, this should not affect performance)
• The converted result need not be a string
• Related to Platform Collection of Deephaven Build Number/Date #228

[stanbrub]

This ticket has been fulfilled by approaching the problem a different way. With the change in directory structure, all "set" level directory labels, whether version or date, are lexicographical sort-able. These are used to sort newest to oldest, Timestamp is no longer a factor in the benchmark queries. For example, concerning the nightly category, "last 5 days" means "last 5 sets". Concerning the release category, "last 5 versions" means "last 5 sets".