[eacsl] Handle `TLogic_coerce` in `context_sensitive_term_to_exp`

The previous solution removed the first `TLogic_coerce` of a term in
`term_to_exp`, which would result in errors if several successive
`TLogic_coerce` were in a term. This commit recursively call
`context_sensitive_term_to_exp` on `TLogic_coerce`.