test-lfm2: skip needle test suite for legacy parser
The legacy lfm2 parser requires a "force json schema." marker in the
system message to enable tool call grammar. Skip run_template_test_suite
for legacy mode since it uses generic inputs without this marker.
The explicit tests in test-lfm2.cpp still run and cover the legacy parser
behavior with the proper marker.
Enables: lfm2:legacy
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
