FIX-#7221: Don't use `use_legacy_dataset=False` for `ParquetDataset` #15580

Job	Run time
execution-filter	7s
lint (flake8)	15s
lint (mypy)	2m 32s
Test API, headers and no-engine mode	2m 3s
Test BaseOnPython execution, Python 3.9	15m 54s
test-internals	7m 27s
test-asv-benchmarks	20s
test experimental	8m 45s
test-clean-install-ubuntu	2m 4s
test-ubuntu (engine python, python 3.9, group_1)	22m 11s
test-clean-install-windows	2m 35s
test-windows (engine python, python 3.9, group_1)	41m 57s
Test HDK storage format, Python 3.9	19m 53s
test-ubuntu-sanity (engine ray, python 3.9)	17m 58s
test-spreadsheet (engine ray, python 3.9)	2m 30s
test-ubuntu (engine unidist ${{ matrix.unidist-backend }}, python ${{ matrix.python-version }})	0s
test-ubuntu-sanity (engine dask, python 3.9)	37m 45s
test-spreadsheet (engine dask, python 3.9)	2m 26s
test-ubuntu-sanity (engine unidist, python 3.9)	15m 18s
test-windows-sanity (engine ray, python 3.9)	21m 40s
test-windows-sanity (engine dask, python 3.9)	35m 56s
test-windows-sanity (engine unidist, python 3.9)	27m 11s
merge-coverage-artifacts	5s
upload-coverage	2m 6s
	4h 48m 58s

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