Add deprecation to PipelineSecurityReportFinding.name

What does this MR do and why?

This MR adds a deprecation notice to PipelineSecurityReportFinding GraphQL name field as described in Deprecate PipelineSecurityReportFinding name Gr... (#346335 - closed).

Deprecation MR

Screenshots or screen recordings

How to set up and validate locally

1. In the GraphiQL explorer, query a project that has a pipeline with security findings (https://gitlab.com/gitlab-examples/security/security-reports always works well).

query {
  project(fullPath:"<namespace/project>"){
    pipelines{
      nodes{
        iid
      }
    }
  }
}

2. When using the following query, both name and title should return the same data, but name should not show up in the autocomplete (title should)

query {
  project(fullPath:"<namespace/project>"){
    pipeline(iid:"<pipeline id>"){
      securityReportFindings(first:10){
        nodes{
          name
          title
        }
      }
    }
  }
}

MR acceptance checklist

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

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