fix(engine): improve ansible detection

[JoaoCxMartins]

Closed #6814
Proposed Changes

• join ungrouped to default tags https://docs.ansible.com/ansible/latest/inventory_guide/intro_inventory.html#inventory-basics-formats-hosts-and-groups
• add logic to files contained in the folders group_vars and host_vars https://docs.ansible.com/ansible/latest/tips_tricks/sample_setup.html#sample-directory-layout

I submit this contribution under the Apache-2.0 license.

[github-actions]

KICS version: v1.7.12

Category Results HIGH 0 MEDIUM 0 LOW 0 INFO 0 TRACE 0 TOTAL 0	Metric Values Files scanned 1 Files parsed 1 Files failed to scan 0 Total executed queries 49 Queries failed to execute 0 Execution time 1

[cxMiguelSilva]

LGTM 🚀