feat: add delta column and alignment to benchmark workflow

[knyk-dev]

This update improves our performance benchmark report to make it much easier to read.

• New Delta Column: It now calculates the exact percentage change between the base and PR versions.
• Status Emojis: Added visual icons for quick checks: 🚀 (faster >10%), 🐌 (slower >10%), and ➡️ (no significant change).
• Better Alignment: The script fixes table formatting and removes messy worker suffixes (like -1) from benchmark names.

[CLAassistant]

All committers have signed the CLA.