* [Rust] Enum Query Parameter Serialization Fixes
Adds tests to ensure this won't regress again. Also fixes some other compile errors with Box<> and file uploads.
* Remove duplicate query param integration tests from petstore samples
* re-gen samples
* fix enum boxing tests
* stream files
* samples
* doc generator fix & snapshot
* doc generation fixes, update samples
* another attempt to fix the doc generator
* improve doc generation - don't try link to internal models, and fixing links missing in some scenarios
the rust doc generator will be the death of me
* also fix hyper
* applying same fix to hyper
* snapshot fixes
* fix(rust): simplify None logic
Used to be a code path (where isFreeFormObject and something else) where we could end up with two `: None` `: None`'s
This does add the None for the !required && !isArray && !isMap && !isNullable case (where nothing would have been printed before.
Above for the type on the individual vars inside the struct definition the logic is simply if not required then it's optional.
If it's optional we want a None when creating a new struct.
* ci: add tests for failure
