Rename pipelines setting to CI/CD and reposition

What does this MR do?

Makes a simple setting move in the DOM at Settings > General > Visibility, project features, permissions

• Change the name of Pipelines to CI/CD
• Moves out from under Repository

Related to: #225526 (closed)

Screenshots (strongly suggested)

before	after

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
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• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

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• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
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