Refactor: rename `fullPath` to `projectPath`

...scripts/ci/mixins/pipeline_variables_permissions_mixin.js

...s/ci/pipeline_schedules/components/pipeline_schedules.vue

...pipeline_schedules/components/pipeline_schedules_form.vue

...pts/ci/pipeline_schedules/mount_pipeline_schedules_app.js

...i/pipeline_schedules/mount_pipeline_schedules_form_app.js

app/helpers/ci/pipeline_schedules_helper.rb

app/views/projects/pipeline_schedules/index.html.haml

...nd/ci/mixins/pipeline_variables_permissions_mixin_spec.js

...line_schedules/components/pipeline_schedules_form_spec.js

.../pipeline_schedules/components/pipeline_schedules_spec.js

spec/helpers/ci/pipeline_schedules_helper_spec.rb