[cwksp] Align all allocated "tables" and "aligneds" to 64 bytes (#2546)

[cwksp] Align all allocated "tables" and "aligneds" to 64 bytes (#2546)

* Perform 64-byte alignment of wksp tables and aligneds internally

* Clean up cwskp_finalize() function to only do two allocs

* Refactor aligned/buffer reservation code, remove ASAN req for alignment reservations

* Change from allocating 128 bytes always to allocating only buffer space as needed for tables/aligned

* Back out aligned/table reservation order restriction

* Add stricter bounds for new/resized wksps, fix comment in zstd_cwksp.h