Add AAutils pylint configuration for virttest utils migration

This adds the AAutils pylint configuration for avocado-vt utilities,
following the same approach as avocado's utils migration setup.

Changes:
- Add .pylintrc_utils with strict AAutils checks (docparams, docstyle, sphinx)
- Update avocado-static-checks.conf to apply AAutils config to virttest
- Blacklist all 96 utility files (64 can migrate, 32 can't migrate)
- Ignore all non-utility virttest files

Workflow:
1. Remove file from ignore-paths in .pylintrc_utils
2. Run static checks to see AAutils compliance issues
3. Fix issues and migrate to AAutils

Signed-off-by: Harvey Lynden <hlynden@redhat.com>

Author: harvey0100