MR !2311 fixed an issue where some base C types were not recognized by
`SerializableTypeString`. However, the fix was such that different types
with the same layout had the same string. For example `char` and
`signed char` both were given the string `I8`. That meant that the
serialization/deseralization would work, but the deserialization could
change the type. That could cause problems if two arrays were expected
to have the same type but did not.
This change undoes much of MR !2311 and redoes it so that the types are
correct.
Previously, `SerializableTypeString` was specialized only for the VTK-m
defined int types (`Int8`, `UInt8`, `Int16`, etc.). You would think this
would cover all the base int types, but in fact C++ defines multiple int
types that have the exact same bit layout. These duplicates will not
match each other when matching template specializations. For example,
`char` is either the same as `signed char` or `unsigned char`, but will
match neither. Likewise, `long` is the same as either `int` or `long
long`, but all these types will match different template
specializations.
Now all integer types are covered.
