chore(analysis/normed_space/exponential): Make the `𝔸` argument implicit (#13986)
`exp 𝕂 𝔸` is now just `exp 𝕂`.
This also renames two lemmas that refer to this argument in their name to no longer do so.
In a few places we have to add type annotations where they weren't needed before, but nowhere do we need to resort to `@`.