Update ohai gem to 18.1.3

What does this MR do and why?

Update the ohai gem to 3.1.3 to support ruby 3.1.

Related

Closes #424131 (closed)

How to set up and validate locally

1. Green pipeline.

2. Install omnibus package.

3. Verify ohai version is installed:

   /opt/gitlab/embedded/bin/gem list ohai
   *** LOCAL GEMS ***
   
   ohai (18.1.3, 17.9.0)

4. Check version in rails:

   sudo gitlab-rails console
   irb(main):001:0> Gem.loaded_specs["ohai"]
   .
   .
   .
   s.name = "ohai"
   s.version = Gem::Version.new("18.1.3")
   .
   .
   .

5. Verify operating system returned by ohai:

   sudo gitlab-rake gitlab:usage_data:generate | grep operating_system
   "operating_system": "ubuntu-22.04",

MR acceptance checklist

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