Enable logging by default [Go]

[dingsdax]

Update logs behavior to follow the same opt-in model as disableMetrics:

• Users are considered opted-in when:
  • They call the equivalent of sentry.NewLogger, or
  • They explicitly enable a logging integration.
• Change default: change the EnableLogs to DisableLogs option.
• Audit all logging integrations to ensure:
  • No logs are emitted unless the integration is explicitly enabled.
• Update documentation:
  • Explain new default behavior of DisableLogs.
  • Clarify requirement to explicitly enable logging integrations.

[linear-code]

GO-143