Add `short_sha` and `ref_path` to `PipelineType` (GraphQL)

What does this MR do and why?

Resolves #330381 (closed)

How to set up and validate locally

1. pull code from gentcys/gitlab:add-short_sha-to-pipeline-type
2. start GDK
3. open browser and view http://you-local-gitlab-address/-/graphql-explorer
4. input query

   {
       project(fullPath: "You project full path") {
           pipelines {
               edges {
                   node {
                       iid
                       id
                       refPath
                       shortSha: sha(format: SHORT)
                       longSha: sha(format: LONG)
                   }
               }
           }
       }
   }

5. click search button

MR acceptance checklist

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