Seperate tests.json files to smaller files

[GalRogozinski]

Description

We want each test to be represented by his own file.
This is so that we can track changes with more ease.

Requirements

[ ] - large tests.json file should be still generated but taken out of the repo
[ ] - instead commit to the repo the small tests.json files
[ ] - stop compressing the large json file (because git already does compression so it is redundant)

[alan-ssvlabs]

If we create small json files for each tests and agree to take out large tests.json from the repo, why do we still need to generate large tests.json? We can also change TestJson to use small json files.

[GalRogozinski]

currently the ssv node uses this large file...
we can make them transition to read lots of small files...
Up until now they didn't have time to breath but maybe we can sync with @moshe-blox

In the meanwhile leave the requirement as is