Add functionality to list plugin package requirements

[Caelion]

Add functionality to list plugin package requirements regarding pip2 and pip3 to avoid check it manually in all plugin

Description

Add functionality to list plugin package requirements regarding pip2 and pip3 to avoid check it manually in all plugin

Suggested changelog entry

Page de mise à jour : Ajout d'une synthèse des paquets pip2 et pip3 utilisés par les plugins et leurs versions attendues afin de limiter les mises à jours dépassant les versions requises par les plugins.

Related issues/external references

Fixes #

Types of changes

• Bug fix (non-breaking change which fixes)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
  • This change is only breaking for integrators, not for external standards or end-users.
• Documentation improvement

PR checklist

• I have checked there is no other PR open for the same change.
• I have read the [La ligne directrice pour contribuer à ce projet / Contribution guidelines for this project).
• I grant the project the right to include and distribute the code under the GNU.
• I have added tests to cover my changes.
• I have verified that the code complies with the projects coding standards.
• [Required for new sniffs] I have added MD documentation for the sniff.