Simplify tosa_ext_profile_ops_info.json

Remove extraneous generator argument directives and re-order
alphabetically.
Fix conformance generation of negative tests to cope with new
argument format (and old format).

Signed-off-by: Jeremy Johnson <jeremy.johnson@arm.com>
Change-Id: I98ee7007c30d9086ef11df515f3be972e7a83395