FFI: get scalars from arrays #6602

Job	Run time
C++ API (coverage)	1m 0s
Rust/C++ FFI tests (asan)	1m 47s
Rust tests (tsan)	6m 34s
Rust/C++ FFI tests (tsan)	1m 32s
Rust tests (miri)	1m 22s
Mirror DuckDB to R2 / Resolve DuckDB version and check R2	8s
Rust tests (asan)	6m 53s
Mirror DuckDB to R2 / Mirror DuckDB ${{ matrix.archive }} to R2	0s
DuckDB libraries available in R2	3s
Rust tests (coverage) (tests)	6m 40s
	25m 59s

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