DNM: Refactoring the data collector script

[jpodivin]

Description

Please don't merge this for now, until it's absolutely certain what will be necessary on the config side.

Included:

• script now reads config files only when called as main.
• decorator turned into simple loop
• configuration for collector will now depend on collection being enabled
• there are no more default user agents
• tests of data collector no longer need global override for imports
• maximum size of user data is now defined in config

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change

Related Tickets & Documents

• Related Issue #
• Closes #

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.