gem: pin down googleauth gem to below 1.9

[ahasunos]

Description

This PR addresses recent CI failures on Windows caused by changes in googleauth gem's method https://github.com/googleapis/google-auth-library-ruby/blob/8f127eee40b0f970706c59cb324f71408dd2fec4/lib/googleauth/compute_engine.rb#L72 . To restore stability to our CI pipelines, we're pinning the googleauth gem to version below 1.9 in our gemspec.

Related Issue

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New content (non-breaking change)
• Breaking change (a content change which would break existing functionality or processes)

Checklist:

• I have read the CONTRIBUTING document.

[ahasunos]

The intuition behind pinning googleauth below 1.9 is that the CI is failing with the following stacktrace on Windows

Click to see the stacktrace

C:/ruby31/lib/ruby/3.1.0/win32/registry.rb:289:in `OpenKey': The system cannot find the file specified. (Win32::Registry::Error)
  from C:/ruby31/lib/ruby/3.1.0/win32/registry.rb:431:in `open'
  from C:/ruby31/lib/ruby/3.1.0/win32/registry.rb:542:in `open'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_smbios.rb:123:in `load_product_name'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_smbios.rb:36:in `block in initialize'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/lazy_value.rb:462:in `perform_compute'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/lazy_value.rb:279:in `get'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_smbios.rb:51:in `product_name'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_smbios.rb:83:in `google_compute?'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:708:in `block in gce_check'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:706:in `synchronize'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:706:in `gce_check'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:397:in `lookup_response'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:445:in `lookup'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env/compute_metadata.rb:487:in `check_existence'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/google-cloud-env-2.1.1/lib/google/cloud/env.rb:129:in `metadata?'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/googleauth-1.11.0/lib/googleauth/compute_engine.rb:73:in `on_gce?'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/googleauth-1.11.0/lib/googleauth/application_default.rb:58:in `get_application_default'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/train-3.12.0/lib/train/transports/gcp.rb:96:in `connect'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/train-3.12.0/lib/train/transports/gcp.rb:49:in `initialize'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/train-3.12.0/lib/train/transports/gcp.rb:33:in `new'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/train-3.12.0/lib/train/transports/gcp.rb:33:in `connection'
  from C:/workdir/lib/inspec/backend.rb:38:in `create'
  from C:/workdir/lib/inspec/runner.rb:92:in `configure_transport'
  from C:/workdir/lib/inspec/runner.rb:84:in `initialize'
  from C:/workdir/lib/inspec/cli.rb:407:in `new'
  from C:/workdir/lib/inspec/cli.rb:407:in `block in exec'
  from C:/workdir/lib/inspec/feature/runner.rb:24:in `with_feature'
  from C:/workdir/lib/inspec/feature.rb:6:in `with_feature'
  from C:/workdir/lib/inspec/cli.rb:395:in `exec'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/thor-1.2.2/lib/thor/command.rb:27:in `run'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/thor-1.2.2/lib/thor/invocation.rb:127:in `invoke_command'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/thor-1.2.2/lib/thor.rb:392:in `dispatch'
  from C:/ruby31/lib/ruby/gems/3.1.0/gems/thor-1.2.2/lib/thor/base.rb:485:in `start'
  from C:/workdir/lib/inspec/base_cli.rb:40:in `start'
  from C:/workdir/inspec-bin/bin/inspec:11:in `<main>'

This arises from the method:

https://github.com/googleapis/google-auth-library-ruby/blob/8f127eee40b0f970706c59cb324f71408dd2fec4/lib/googleauth/compute_engine.rb#L72

which was updated in PR: googleapis/google-auth-library-ruby#459

Hence, using a version which doesn't include the changes in this method.