`TermLiteral` doesn't strip ticks

As discovered in https://github.com/clash-lang/clash-compiler/pull/2925, `TermLiteral` doesn't strip ticks, even though they're completely useless for the class. We could change every instance to be careful around ticks, but it's probably a better idea to rename `termToData` to `termToData#`, while introducing:

```haskell
termToData = termToData# . stripAllTicks
```