Truncate gen_ai attributes to 256KB instead of exempting from truncation#48454

Copilot wants to merge 2 commits intomainAzure/azure-sdk-for-java:mainfrom

copilot/truncate-genai-attributes-256kbAzure/azure-sdk-for-java:copilot/truncate-genai-attributes-256kbCopy head branch name to clipboard