Extract EE specific files/lines for spec/lib/gitlab/ci

We have the following files containing EE specific code. We should move them to ee/

• spec/lib/gitlab/ci/config_spec.rb (one line change)
• spec/lib/gitlab/ci/pipeline/chain/create_spec.rb (one line change)
• spec/lib/gitlab/ci/pipeline/chain/populate_spec.rb (two lines change)
• spec/lib/gitlab/ci/pipeline/chain/validate/config_spec.rb (one line change)
• spec/lib/gitlab/ci/yaml_processor_spec.rb (one line change)

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• spec/lib/gitlab/ci/pipeline/chain/validate/abilities_spec.rb (two lines change)

We could maybe just take the EE version for those files!