Clean up gen_ai attributes usages in AI instrumentations #19248

Following changes made in https://getsentry.github.io/sentry-conventions/attributes/gen_ai/#gen_ai-agent-name we need to replace deprecated attributes with new attributes.

• gen_ai.system → gen_ai.provider.name
• gen_ai.request.available_tools → gen_ai.tool.definitions
• gen_ai.response.text → gen_ai.output.messages
• gen_ai.response.tool_calls → gen_ai.output.messages
• gen_ai.tool.input → gen_ai.tool.call.arguments
• gen_ai.tool.output → gen_ai.tool.call.result
• gen_ai.prompt → gen_ai.input.messages
• gen_ai.usage.cache_creation_input_tokens → gen_ai.usage.input_tokens.cache_write
• gen_ai.usage.cache_read_input_tokens → gen_ai.usage.input_tokens.cache