Fix CI setup

[jrochkind]

Several accumulated test setup things were preventing green CI. In some cases I don't really understand how CI used to pass but stopped with no code changes, but these changes all make sense.

Fix rubocop violation on parens around logical expression

Don't know exactly how this got in main branch, but currently failing build due to:

lib/browse_everything/driver/base.rb:72:19: C: [Correctable] Style/RedundantParentheses: Don't use parentheses around a logical expression.
        @name ||= (@config[:name] || self.class.name.split(/::/).last.titleize)

OpenStruct reference

Again can't explain why this passed CI at some previous point but stopped, but was getting errors with:

     NameError:
       uninitialized constant BrowseEverything::Auth::Google::OpenStruct
     # ./lib/browse_everything/auth/google/request_parameters.rb:7:in `<module:Google>'

Fixed with require 'ostruct' and changing reference to explicit top-level ::OpenStruct.

Sqlite3 version

sqlite3 ruby gem 2.x came out a few months ago. But Rails versions <= 7.1 still need to use 1.x I think? Error like:

       # Gem::LoadError:
       #   can't activate sqlite3 (~> 1.4), already activated sqlite3-2.0.2. Make sure all dependencies are added to Gemfile.

Changed development dependency in gemspec to:

spec.add_development_dependency 'sqlite3', "~> 1.4"

[cjcolvar]

Looks great! Thanks for fixing this!