Avoid DB query for obviously invalid queryKeys of saved queries
Summary:
Do not execute a PhabricatorSavedQueryQuery in the database when a queryKey is passed which is obviously bogus.
Closes T16482
Test Plan:
* Adjust the newly added exception error message, go to http://phorge.localhost/conduit/method/project.column.search/ and enter a "string" in the queryKey field which does not have 12 characters.
* Adjust the newly added exception error message, go to http://phorge.localhost/maniphest/query/nonsense/#R and still get a 404.
* Optionally, check in DarkConsole that there is one less DB query (I did not).
Reviewers: O1 Blessed Committers, mainframe98
Reviewed By: O1 Blessed Committers, mainframe98
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16482
Differential Revision: https://we.phorge.it/D26720