Replace LayoutStrategy buffered_bytes with a buffered bytes tracker #6589

Job	Run time
C++ API (coverage)	1m 1s
Rust/C++ FFI tests (tsan)	1m 55s
Rust tests (tsan)	6m 33s
Rust/C++ FFI tests (asan)	2m 8s
Rust tests (asan)	7m 0s
Rust tests (miri)	1m 33s
Mirror DuckDB to R2 / Resolve DuckDB version and check R2	7s
DuckDB libraries available in R2	3s
Mirror DuckDB to R2 / Mirror DuckDB ${{ matrix.archive }} to R2	0s
Rust tests (coverage) (tests)	4m 5s
	24m 25s

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