Ruby 3.4 Support: Errors and their output may be different

[kaylareopelle]

In the config_file_loading multiverse suite, the test test_warning_logged_when_config_file_erb_error fails because the file name and line number are no longer included in the error output. In addition, the error class has also changed.

Ruby 3.3.1:

** [NewRelic] FATAL : Failed ERB processing configuration file. This is typically caused by a Ruby error in <% %> templating blocks in your newrelic.yml file.
** [NewRelic] FATAL : (erb):4: syntax error, unexpected local variable or method, expecting '('
; _erbout.<<(( this is not ruby ).to_s); _erbout

Ruby 3.4.0-preview2:

[2024-10-08 16:38:39 -0700 C02F23LMMD6P (16577)] ERROR : Failed ERB processing configuration file. This is typically caused by a Ruby error in <% %> templating blocks in your newrelic.yml file.
[2024-10-08 16:38:39 -0700 C02F23LMMD6P (16577)] ERROR : NameError: undefined local variable or method 'ruby' for an instance of NewRelic::Agent::Configuration::YamlSource

In addition to fixing the test, we may want to take a closer look at our New Relic agent log error output and errors inbox behavior to see if there are unintended changes that might compromise the customer's experience.

The config_file_loading suite is currently disabled for Ruby 3.4.0-preview2. It will need to be manually re-enabled for testing.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-323629