MGARD Decompression with s parameter is incorrect

[NAThompson]

Describe the bug

When MGARD is compressed with a certain value of s for the Besov s-norm, it must be decompressed with the exact same value of s, or else the decompressed values are completely wrong.

To Reproduce

The ADIOS2 wrapper always uses the s-parameter to compress; see here.

However, it never uses the s-parameter to decompress, see here.

I regard this as very low-priority, since MGARD is considering storing s in the compressed stream; see here.