added test for pipeline_api (text, m_input1, m_input2, response_schema, response_type)

[kravetsmic]

In the PR I have 4 pipeline-notebooks, which cover different cases. So, if the tests accept parameters like text, response_type, response_schema, m_section, and m_section_regex, the script will generate tests for pipeline_api if it has only text parameter, text with response_type, text with response_schema and etc.

[cragwolfe]

Closing this in favor of https://github.com/Unstructured-IO/unstructured-api-tools/pull/138 .