Use Data Lake import API for faster Cypress test data setup

[tenthe]

Body

Many Cypress tests currently prepare Data Lake data by uploading fixture files through a File_Stream adapter and persisting them via a pipeline. This adds avoidable setup complexity, longer execution times, and flaky waits because tests have to wait until the pipeline has ingested the data.

We should migrate the test-data setup for suitable E2E tests to the new Data Lake import REST API. Instead of creating adapters and persistence pipelines, tests should seed datasets directly through the import endpoint with static fixture data.

StreamPipes Committer

I acknowledge that I am a maintainer/committer of the Apache StreamPipes project.