The base C types have several "duplicate" types that the compiler
considers different even though the byte representation is the same. For
example, `char` and `signed char` have the same meaning but are treated
as different types. Likewise, 'long', 'int', and 'long long' are all
different types even though 'long' is the same as either 'int' or 'long
long'.

When pulling extracted components from `UnknownArrayHandle`, there is
little value for creating multiple code paths for types like `char` and
`signed char`. Instead, allow implicit conversion among these types.