Update perf and latest features for llm models (Mar 10)

[skhorasganiTT]

Ticket

N/A

Problem description

N/A

What's changed

• Updated perf and stable release versions for llm models on front page README
• Updated MODEL_UPDATES with latest model features
• Rearranged models in LLM table to group by family, except for the top models

Checklist

• All post commit CI passes
• Blackhole Post commit CI passes (if applicable)
• Model regression CI passes (if applicable)
• Device performance regression CI passes (if applicable)
• (For models and ops writers) Full new models tests CI passes (if applicable)
• New/Existing tests provide coverage for changes