Improve CI message for timeout error and Update CI config error title

What does this MR do and why?

Per #351168 (closed), some users have been receiving a timeout error when using remote includes. In an effort to help the user understand when remote include references are timing out, this issue is to improve the error messaging that is displayed when this scenario occurs.

New error text for CI config/yaml errors should be:

Unable to create pipeline

Request timed out when fetching configuration files.

Additionally, remove the link to CI Lint from the error since it doesn't provide additional context about the error.

Screenshots or screen recordings

• Original messaging

• New messaging

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #351168 (closed)