fix: remove unused runtime class, kernel params, and commented-out templates

Address PR review feedback:
- Remove detect-runtime-class.yaml (OSC operator manages RuntimeClass)
- Remove bm-kernel-params.yaml and kernel-params-mco.yaml (config should
  be provided via initdata or pod annotations to avoid inconsistencies)
- Remove commented-out runtimeclass templates for AMD SNP and Intel TDX

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: butler54