Make smoke tests check recently added data deduplication feature

[fxamacker]

Closes #349 Updates epic #292 and issue #296

Currently, the data deduplication feature added by PR https://github.com/onflow/atree/pull/342 is not being checked by smoke tests. We need to smoke test encoding/decoding to the new compact map format (which deduplicates nested Cadence composite types).

This PR adds nested composite types to smoke tests and checks encoding/decoding with the new compact map format to test data deduplication.

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• [ ] Targeted PR against main branch
• [x] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels