rcc

fix: Support reading from multiple Parquet files again #2408

Job	Run time
Smoke test: stock R	21m 27s
Check matrix	9s
rcc: ${{ matrix.os }} (${{ matrix.r }}) ${{ matrix.desc }}	0s
Without adbcdrivermanager	38m 45s
Without arrow	39m 12s
Without bit64	38m 5s
Without clock	37m 39s
Without DBItest	36m 55s
Without dbplyr	37m 16s
Without dplyr	38m 27s
Without tibble	38m 4s
Without vctrs	37m 35s
	6h 3m 34s

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