[Adalennis]

Fixes #9406

• dataset-input.hpl reads the data set run-pipeline-tests-input, which the samples project already has, and its note says so.
• dataset-output.hpl writes to its own data set dataset-output with "Recreate data set" on, so the first run creates the data set and its CSV file.
• execute-unit-tests.hpl runs the unit test run-pipeline-tests-unit.
• execution-information.hpl gets a Data grid with the "include children" and "limit" fields that "Get execution IDs" requires, and the samples project gets the execution information location local it uses (a File location in ${HOP_AUDIT_FOLDER}/executions/, as local-audit in the default project). The type and name fields, which this operation doesn't use, are cleared.
• data-stream-input.hpl and data-stream-output.hpl move to the Apache Arrow plugin, next to the sample-data-stream metadata they use, so they are only installed with that plugin.

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[bamaer]

Thanks @Adalennis, LGTM.

We ran all six samples with hop-run in a scratch copy of the samples project. They run without errors, and run-pipeline-tests-unit passes. We didn't run the Maven build or a marketplace install of Arrow.