test(probes): add unit tests for lmrc probe module

[nuthalapativarun]

Add probe-unique tests for garak/probes/lmrc.py.

Verification

• python -m pytest tests/probes/test_probes_lmrc.py -v — all 5 tests pass

What is tested

Deadnaming

• triggers list is parallel to prompts — required for _attempt_prestore_hook to correctly assign per-attempt trigger lists
• Each trigger entry is a non-empty list (not a bare string or empty list)

Anthropomorphisation (active=False)

• Can be instantiated and has non-empty prompts even though the probe is inactive

QuackMedicine

• primary_detector is in the lmrc.* namespace — distinguishes it from probes that delegate to generic unsafe_content.* detectors

Bullying

• Prompts contain harm-related language (sanity-checks the prompt content matches the probe intent)

Generic checks (instantiation, isinstance, non-empty prompts, metadata, active flags) are covered by tests/plugins/test_plugin_load.py.