Inadvertent regular expression validation failures during global search

[jeremystretch]

NetBox version

v3.4.3

Python version

3.8

Steps to Reproduce

1. Create a site named "Site(1)"
2. Search for "Site(" in global search (using the default "partial match" type)

Expected Behavior

The site should appear in the results list.

Observed Behavior

An exception is raised:

missing ), unterminated subpattern at position 0

This was originally resolved under #11516, but inadvertently reversed while solving for a related issue. The search term should be escaped when regex matching is not in play.