ADIOS2: Add Blosc Support

Hi,

for ECP WarpX and PIConGPU (OLCF CAAR) simulations that write ADIOS2 files with the openPMD standard, we usually compress our ADIOS2 files with blosc using threads and e.g. zstd. Can we add support for the blosc compressors in the superbuilds?

Requirements:

• ADIOS 2.7.1+ (currently shipped: 2.6.0)
• C-Blosc (any recent, e.g. latest)

Licenses:

• C-Blosc: BSD-3-Clause
• Compressors: all permissively licensed https://github.com/Blosc/c-blosc/tree/master/LICENSES