make data_svc load_ability_file function more resilient

[uruwhy]

Description

• add better yaml checks and error handling when loading ability files
• override equality operator for Executor class
• clearer warning message for mismatched tactic when loading ability files
• improve logic to extract plugin name from filepath

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Unit tests

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[clenk]

LGTM