Fix codegen-serde test issues

- Fix service name from ConstraintService to ConstraintsService in SerdeProtocolTestTest
- Fix needless lifetime warnings by using '_ instead of explicit lifetimes
- Load constraints.smithy model explicitly in testRestJson

Remaining issues:
- Feature test expects serde feature not to be added when trait not used
- Serialization test has float/double value differences

Author: rcoh

codegen-serde/src/main/kotlin/software/amazon/smithy/rust/codegen/serde/SerializeImplGenerator.kt

@@ -544,7 +544,7 @@ class SerializeImplGenerator(private val codegenContext: CodegenContext) {
     ) {
         rustTemplate(
             """
-            impl<'a> #{serde}::Serialize for #{ConfigurableSerdeRef}<'a, #{Shape}> {
+            impl #{serde}::Serialize for #{ConfigurableSerdeRef}<'_, #{Shape}> {
                 fn serialize<S>(&self, serializer: S) -> #{Result}<S::Ok, S::Error>
                 where
                     S: #{serde}::Serializer,
@@ -567,7 +567,7 @@ class SerializeImplGenerator(private val codegenContext: CodegenContext) {
         return writable {
             rustTemplate(
                 """
-                impl<'a, 'b> #{serde}::Serialize for #{ConfigurableSerdeRef}<'a, #{Shape}<'b>> {
+                impl #{serde}::Serialize for #{ConfigurableSerdeRef}<'_, #{Shape}<'_>> {
                     fn serialize<S>(&self, serializer: S) -> #{Result}<S::Ok, S::Error>
                     where
                         S: #{serde}::Serializer,

codegen-serde/src/main/kotlin/software/amazon/smithy/rust/codegen/serde/SupportStructures.kt

@@ -133,7 +133,7 @@ object SupportStructures {
                 """
                 pub(crate) struct Sensitive<T>(pub(crate) T);
 
-                impl<'a, T> #{serde}::Serialize for ConfigurableSerdeRef<'a, Sensitive<T>>
+                impl<T> #{serde}::Serialize for ConfigurableSerdeRef<'_, Sensitive<T>>
                 where
                 T: #{serde}::Serialize,
                 {
@@ -175,7 +175,7 @@ object SupportStructures {
                         .serialize(serializer)
                     }
                 }
-                impl<'a, T> #{serde}::Serialize for #{ConfigurableSerdeRef}<'a, Option<T>>
+                impl<T> #{serde}::Serialize for #{ConfigurableSerdeRef}<'_, Option<T>>
                 where
                     T: #{SerializeConfigured},
                 {

codegen-serde/src/test/kotlin/software/amazon/smithy/rust/codegen/serde/SerdeProtocolTestTest.kt

@@ -30,14 +30,15 @@ class SerdeProtocolTestTest {
         fun testedModels(): Stream<Arguments> =
             Stream.of(
                 Arguments.of(ShapeId.from(ServiceShapeId.REST_JSON)),
-                Arguments.of(ShapeId.from("com.amazonaws.constraints#ConstraintService")),
+                Arguments.of(ShapeId.from("com.amazonaws.constraints#ConstraintsService")),
             )
     }
 
     @Test
     fun testRestJson() {
-        val serviceShapeId = ShapeId.from("com.amazonaws.constraints#ConstraintService")
-        val model = Model.assembler().discoverModels().assemble().result.get().attachSerdeToService(serviceShapeId)
+        val serviceShapeId = ShapeId.from("com.amazonaws.constraints#ConstraintsService")
+        val filePath = "../codegen-core/common-test-models/constraints.smithy"
+        val model = File(filePath).readText().asSmithyModel().attachSerdeToService(serviceShapeId)
         clientIntegrationTest(
             model,
             IntegrationTestParams(service = serviceShapeId.toString(), cargoCommand = "cargo test --all-features"),