Updates to the AI Application Security templates

These updates are to match the VRT update - bugcrowd/vulnerability-rating-taxonomy#464

Adding:
P1 - AI Application Security - Training Data Poisoning - Backdoor Injection / Bias Manipulation
P1 - AI Application Security - Model Extraction - API Query-Based Model Reconstruction
P1 - AI Application Security - Sensitive Information Disclosure - Cross-Tenant PII Leakage/Exposure .
P1 - AI Application Security - Sensitive Information Disclosure - Key Leak
P1 - AI Application Security - Remote Code Execution - Full System Compromise
P2 - AI Application Security - Remote Code Execution - Sandboxed Container Code Execution
P2 - AI Application Security - Prompt Injection - System Prompt Leakage
P2 - AI Application Security - Vector and Embedding Weaknesses - Embedding Exfiltration / Model Extraction
P3 - AI Application Security - Vector and Embedding Weaknesses - Semantic Indexing
P2 - AI Application Security - Denial-of-Service (DoS) - Application-Wide
P4 - AI Application Security - AI Safety - Misinformation / Wrong Factual Data
P4 - AI Application Security - Insufficient Rate Limiting - Query Flooding / API Token Abuse
P4 - AI Application Security - Denial-of-Service (DoS) - Tenant-Scoped
P4 - AI Application Security - Adversarial Example Injection - AI Misclassification Attacks
P3 - AI Application Security - Improper Output Handling - Cross-Site Scripting (XSS)
P4 - AI Application Security - Improper Output Handling - Markdown/HTML Injection
P5 - AI Application Security - Improper Input Handling - ANSI Escape Codes
P5 - AI Application Security - Improper Input Handling - Unicode Confusables
P5 - AI Application Security - Improper Input Handling - RTL Overrides

Removing:
P1 - AI Application Security - Large Language Model (LLM) Security - LLM Output Handling
P1 - AI Application Security - Large Language Model (LLM) Security - Prompt Injection
P1 - AI Application Security - Large Language Model (LLM) Security - Training Data Poisoning
P2 - AI Application Security - Large Language Model (LLM) Security - Excessive Agency/Permission Manipulation

Author: RRudder