Reorganize the types/models/primitives modules

.../software/amazon/smithy/rustsdk/BaseRequestIdDecorator.kt

...on/smithy/rustsdk/HttpConnectorConfigCustomizationTest.kt

...oftware/amazon/smithy/rustsdk/RegionProviderConfigTest.kt

...rc/test/kotlin/software/amazon/smithy/rustsdk/TestUtil.kt

...zon/smithy/rust/codegen/client/smithy/ClientRustModule.kt

...codegen/client/smithy/customize/RequiredCustomizations.kt

...t/codegen/client/smithy/generators/ClientEnumGenerator.kt

...amazon/smithy/rust/codegen/client/testutil/TestHelpers.kt

...lient/customizations/ResiliencyConfigCustomizationTest.kt

...n/client/endpoint/ClientContextConfigCustomizationTest.kt

.../codegen/client/endpoint/EndpointResolverGeneratorTest.kt

...st/codegen/client/smithy/EventStreamSymbolProviderTest.kt

...degen/client/smithy/generators/ClientEnumGeneratorTest.kt

...odegen/client/smithy/generators/ClientInstantiatorTest.kt

...ent/smithy/generators/http/RequestBindingGeneratorTest.kt

...nt/smithy/generators/http/ResponseBindingGeneratorTest.kt

...rotocols/eventstream/ClientEventStreamBaseRequirements.kt

...nt/smithy/transformers/RemoveEventStreamOperationsTest.kt

...software/amazon/smithy/rust/codegen/core/testutil/Rust.kt

...server/smithy/generators/UnconstrainedMapGeneratorTest.kt