Support trivial encryption in secret dialect and noise analysis #1887
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j2kun
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Leaving in a draft state for now.
This PR is a bit weird because, while it makes sense to instantiate a trivial encryption for type mismatches at the secret level, I'm not aware of any trivial encryption mechanism in either Lattigo or OpenFHE, so we wouldn't be able to emit these ops without further combining trivial_encrypt + ct-ct-op -> pt-ct op down the line.
Fixes #1875