S3 protocol

[LuisSanchez25]

What is the problem / what does the code in this PR do

Adds S3 functionality to strax

Can you briefly describe how it works?

We can now use an S3 storage system to store data

Can you give a minimal working example (or illustrate with a figure)?

import strax st = strax.Context() s3_storage = strax.S3Frontent() st.storage = [s3_storage]

Please include the following if applicable:

• Update the docstring(s)
• Update the documentation
• Tests to check the (new) code is working as desired.
• Does it solve one of the open issues on github?

Please make sure that all automated tests have passed before asking for a review (you can save the PR as a draft otherwise).