Newrelic-sb-sdk

* Report test execution to Gitlab.
* Update Gitlab CI/CD pipelines.
* Restore docs building and publishing to Gitlab Pages

* Update GraphQL submodule with a fresh schema version.
* Update dependencies.
* Add tests.
* Add autopublish with GitLab CI/CD.

* Rename arguments in NewRelicGqlClient.build_query method and build_query
function from `query_params` to `params` and `query_string` to `template`.
* Update graphql module.
* Add metadata about language info in GraphQL notebook.
* Add new clasifiers for PyPi.
* Add build status badge.
* Update links documentation links.

* Make `query_params` optional in `build_query`.
* Fix code generation form nerdgraph schema.
* Fix graphql module.

* Replace pipe operator by Union in types annotations to ensure compatibility
with python 3.8.1 and higer.

* Update GraphQL submodule with a fresh schema version.
* Update dependencies.
* Update pre-commit hooks.