Fix: tokens with quoted values were broken in literal mode
Created by: attfarhan
Fixes https://github.com/sourcegraph/sourcegraph/issues/6255.
Previously, we failed to match search filters that had a quoted string as their value and recognize them as a single token.
In this PR I made it such that we match the different types of regexes sequentially, starting with specifically tokens with quoted strings as values. This fixes cases such as the one mentioned in the issue.