This will use the actual structure name or the override
from the trait as needed. Return value support
is also enabled in the code generation but not in
aws.zig. The current fuzzy checks should get most
of the way there though
Key changes:
1. Remove all unused variables (see zig commit cf65ab8)
2. Remove tests requiring other files
3. Specify enum type when providing specific enum values (see zig
commits around 507a8096d)
code in the function required found variable to be a real count
for allocation purposes, but it was originally coded as a flag
instead, which broke any field with more than two underscores
