Allow searching text for study name and description

[naglepuff]

Fix #965
Fix #1071

This PR adds some additional query options when using the text search bar, as well as establishes a framework for including more in the future. For this iteration, we have added plaintext searching for:

title of Study
description of Study
name of Study

In order to accomplish this, our DSL query language has been updated to support using the SQL ilike function. This was a straightforward change for properties represented directly as columns on the study table, but required some additional work for values stored in the annotation column (JSON).

There is also a new CLI command, nmdc-server create-or-replace-nmdc-functions which updates the custom NMDC functions used for ingest and search at a whim, rather than relying on the SQLAlchemy event system. See linked issue #1071 for some additional details.

Updating these functions is also folded into the nmdc-server migrate command, which is invoked in our prestart script. This should populate the needed function when the app spins up.

[jeffbaumes]

I left a comment about the existing listen statement but this all looks great to me.