perf: rewrite data access in gooddata-pandas #512

Job	Run time
Collect changes / collect-changes	6s
Python tests / types-check	1m 7s
Python tests / lint-and-format-check	36s
Python tests / unit-tests (py313)	2m 42s
Python tests / unit-tests (py312)	5m 53s
Python tests / unit-tests (py311)	2m 15s
Python tests / unit-tests (py310)	2m 7s
Python tests / unit-tests (py39)	2m 28s
status-check	1s
	17m 15s

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