Upstream nghttp2 module@1.66.0. envoy to BCR

### Module
- `nghttp2`
- Version:  1.66.0.envoy
- BCR: ✅ exists (1.65.0 - older)
- Source: https://github.com/nghttp2/nghttp2

### Checklist
- [ ] PR 1.66.0 to BCR
- [ ] Update envoy to use BCR version when landed

### Notes
- Toolshed has 1.66.0, BCR has 1.65.0
- nghttp2 has good BCR support
