Web console: make range partitioning a first class citizen of the console

[vogievetsky]

This PR gives range partitioning first class treatment.

Now you can select range from the dropdown (instead of single_dim) and the warning about the dimension order and the partition dimensions not matching up is there also.

Also added suggestions to the string-array input:

This PR has:

• been self-reviewed.
• been tested in a test Druid cluster.

[kfaraz]

Thanks a lot for the changes, @vogievetsky !

Sorry for the late comment as I missed this PR earlier.

I was wondering if we should include a small message/tooltip saying something like

`range` partitioning is the evolved form of `single_dim`, which allows you to perform range partitioning on multiple dimensions instead of just one. To continue to use single dim partitioning, just select `range` and specify only one dimension in your partition dimensions list

or something a little more concise 😅

I think it would avoid confusion for people who are used to seeing single_dim in the dropdowns.