Removes sentry-logger.ts and its test now that OtelLogger is the active
ILogger impl in bind-otel-instrumentation.ts. Updates the binder test to
assert OtelLogger (not SentryLogger) is bound. Fixes TypeScript errors:
SentryLogRecordForwarder registers directly as LogRecordProcessor (not
wrapped in BatchLogRecordProcessor which expects a LogRecordExporter);
severityNumber undefined guard added.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>