[Python] Support more testing model (#2541)

* Remove parameter from `Protocol`s `structuredDataParser`, `structuredDataSerializer`

No implementation of the `Protocol` interface makes use of the
`OperationShape` parameter in the `structuredDataParser` and
`structuredDataSerializer` methods.

* Remove the TypeConversionGenerator class in favor of using
customizations for JsonParserGenerator and ServerHttpBoundProtocolGenerator.

Signed-off-by: Bigo <1781140+crisidev@users.noreply.github.com>

* Make the additionaParserCustomizations default to empty list

* Fix merge conflict

* Fix missing ;

* Use better defaults when checking for customizations

* Use better defaults when checking for customizations

* Add HttpBindingCustomization and relax the datetime symbol check

* Support recursive shapes and add a lot more models to the tests

Signed-off-by: Bigo <1781140+crisidev@users.noreply.github.com>

* Support naming obstacle course

* Add support for constrained blobs conversions

* Support constraint traits

* Try to generate the full diff

Signed-off-by: Bigo <1781140+crisidev@users.noreply.github.com>

* A better way of checking if we need to go into the Timestamp branch

* Remove wheels folder

---------

Signed-off-by: Bigo <1781140+crisidev@users.noreply.github.com>
Co-authored-by: david-perez <d@vidp.dev>