FE: Update mutation for creating a pipeline

This is the FE issue for the corresponding BE: #479122 (closed)

For the run pipeline action, we have a client side mutation that was set up as a temporary fix:

https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/ci/pipeline_new/graphql/mutations/create_pipeline.mutation.graphql

we should implement the proper mutation for it, like these: https://gitlab.com/gitlab-org/gitlab/-/tree/master/app/graphql/mutations/ci/pipeline