[Feature] Use standard archiver software for creating archive files

[pulsargranular]

Description

LTS system prefers archive files of a certain size that are optimal to write and read. Our current implementation creates a uncompressed TAR file which adds files to an archive file as long as it is smaller than the optimum size.

However, the implementation has some limitations:

• it's self-made and might contain bugs or cannot handle certain edge-cases
• the archive files are not compressed
• the archive files are unencrypted
• if the source file is bigger than the optimal archive size, the file is not split into chunks

Solution proposals
There are commercial and non-commercial solutions available that offer such archiving functionalities, such as

• RAR
• 7Zip

Definition of Done

• files of any size are bundled into archive files
• these archive files have fixed size that is most suitable for the LTS system
• optional encryption can be added

[phwissmann]

7z a test.zip \../split -r -mx=0 -v200M seems to be a useful command line

[phwissmann]

This is partially mitigated by #184

Using 7z or tar to create multivolume archives does create binary archives that cannot be opened independently. Furthermore, Scicat's Datablock structure is relying on tarfiles for its metadata fields.

I'd suggest to keep it as is for now.