On upgrading to Ruby 3.4, we've run into the following warning from our test suite with google-apis-core which is the only gem that has an httpclient dependency.

/Users/j.julio/.rbenv/versions/3.4.1/lib/ruby/gems/3.4.0/gems/httpclient-2.8.3/lib/httpclient/util.rb:71: warning: literal string will be frozen in the future (run with --debug-frozen-string-literal for more information)

Related to #2348 since httpclient doesn't seem to be maintained and the issue causing this warning has been unaddressed for many years.