Pytest-otel

* fix: remove pytest timing import [1623](https://github.com/elastic/apm-pipeline-library/pull/1623)

* fix: show traces only on debug mode [1621](https://github.com/elastic/apm-pipeline-library/pull/1621)
* fix: use different tests for the demos [1523](https://github.com/elastic/apm-pipeline-library/pull/1523)

* fix: Pytest update attr [1521](https://github.com/elastic/apm-pipeline-library/pull/1521)

* feat: update the attribute references [1496](https://github.com/elastic/apm-pipeline-library/pull/1496)
* Update main [1468](https://github.com/elastic/apm-pipeline-library/pull/1468)
* fix: Otel avoid conflicts [1464](https://github.com/elastic/apm-pipeline-library/pull/1464)

* fix: improve attributes access [1462](https://github.com/elastic/apm-pipeline-library/pull/1462)

* fix: fix pytest_otel authentication [1452](https://github.com/elastic/apm-pipeline-library/pull/1452)