Lazy load elements in base apport module

[bdrung]

For faster module loading and to avoid circular dependencies, load all elements in the base apport module in a lazy fashion.

[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.92%. Comparing base (3164b24) to head (a4ab24d).

Files with missing lines	Patch %	Lines
apport/__init__.py	89.47%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #475   +/-   ##
=======================================
  Coverage   83.92%   83.92%           
=======================================
  Files         101      101           
  Lines       20455    20471   +16     
  Branches     3215     3215           
=======================================
+ Hits        17167    17181   +14     
- Misses       2839     2842    +3     
+ Partials      449      448    -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.