feature: add a `get_execution_plan` method #578

Job	Run time
Project qase-api-client - Python 3.11	3s
Project qase-api-v2-client - Python 3.11	3s
Project qase-pytest - Python 3.11	22s
Project qase-robotframework - Python 3.11	6s
Project qase-python-commons - Python 3.11	27s
Project qase-api-client - Python 3.10	6s
Project qase-api-v2-client - Python 3.10	6s
Project qase-pytest - Python 3.10	20s
Project qase-robotframework - Python 3.10	3s
Project qase-python-commons - Python 3.10	21s
Project qase-api-client - Python 3.9	6s
Project qase-api-v2-client - Python 3.9	4s
Project qase-pytest - Python 3.9	31s
Project qase-robotframework - Python 3.9	3s
Project qase-python-commons - Python 3.9	24s
Project qase-api-client - Python 3.8	10s
Project qase-api-v2-client - Python 3.8	4s
Project qase-pytest - Python 3.8	26s
Project qase-robotframework - Python 3.8	7s
Project qase-python-commons - Python 3.8	23s
Project qase-api-client - Python 3.7	4s
Project qase-api-v2-client - Python 3.7	9s
Project qase-pytest - Python 3.7	24s
Project qase-robotframework - Python 3.7	3s
Project qase-python-commons - Python 3.7	23s
build-n-publish (qase-api-client)	17s
build-n-publish (qase-api-v2-client)	16s
build-n-publish (qase-pytest)	17s
build-n-publish (qase-robotframework)	14s
build-n-publish (qase-python-commons)	25s
	6m 47s

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