Update hive.rst with Alluxio docs

[haoyuan]

Documentation for this PR: #13743

== NO RELEASE NOTE ==

[haoyuan]

@rschlussel PTAL.

[rschlussel]

@haoyuan Can you squash the two commits together?

[rschlussel]

You can do this in git using:
git rebase -i HEAD~2 and marking the last commit to be squashed into the first one.
Then you can force push to your remote branch using the -f flag to update it. e.g.
git push -f haoyuan patch-2

[wenleix]

@haoyuan : Mind remove the period at the end of commit head? ;)

[haoyuan]

@rschlussel @wenleix PTAL.