Update create pipeline mutation to use GraphQL

...ascripts/ci/pipeline_new/components/pipeline_new_form.vue

...ne_new/graphql/mutations/create_pipeline.mutation.graphql

app/assets/javascripts/ci/pipeline_new/graphql/resolvers.js

app/assets/javascripts/ci/pipeline_new/index.js

...ets/javascripts/ci/pipeline_new/utils/filter_variables.js

.../identity_verification_required_pipeline_new_form_spec.js

...tend/ci/pipeline_new/components/pipeline_new_form_spec.js

spec/frontend/ci/pipeline_new/mock_data.js

spec/frontend/ci/pipeline_new/utils/filter_variables_spec.js

spec/frontend/fixtures/pipeline_create.rb