Hutch-context device aliases

After loading all the standard hutch devices, also load aliases that are hutch-specific.
e.g. in xcs3, alias xcs_att to att
in xpp3, alias xpp_att to att

Original Card:
(Tyler P): A bunch of aliases to make everything shorter (like pp, att, diff, lom, lam, gon should be the specific hutch's device)

(Silke): If hitting 'tab' is really that big a deal, we should be changing the name in happi already (assuming that this is where the device banes come from). Like the MEC request for .ins so that they do not have to hit tab, I think this is not a good enough reason to add an alias. I feel you should gain two keystrokes at least before the clutter of an alias in the tab-completion is outweighed by the typing efficiency gain.

Start by tracing where standard hutch devices are loaded into the interactive session, then review how device names and aliases are represented. Compare the xcs3 and xpp3 examples in the issue and determine the expected alias-loading behavior, including how it should be tested without adding unwanted completion clutter.