Dev v2.1 #287 - Simplify the Gen3-DRS download option

[imendes93]

Closes #287

Description

This PR adds the following alterations:

• added a new --manifest parameter with the input being the .json manifest file downloaded from GTEX
• --reads parameter receives a CSV file with samples for which the analysis will be limited to
• filenames requested but not found in original manifest file are saved in a not_found_GTEX_samples.txt file

[Vlad-Dembrovskyi]

@angarb to test with Simplify-Gen3-DRS-2 tag

[Vlad-Dembrovskyi]

Waiting for this job to finish without issues: https://cloudos.lifebit.ai/app/jobs/620e66cd4ab37f01dbaf58cb https://cloudos.lifebit.ai/public/jobs/620e66cd4ab37f01dbaf58cb (success)