fix: AttributeKey code generation (#1001)

Fix compiler not able to infer type information from generated endpoint attributes.

Author: lauzadis

codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/rendering/endpoints/DefaultEndpointProviderGenerator.kt

@@ -180,7 +180,7 @@ class DefaultEndpointProviderGenerator(
 
                             // otherwise, we just traverse the value like any other rules expression, object values will
                             // be rendered as Documents
-                            writeInline("#T(#S) to ", RuntimeTypes.Core.Collections.AttributeKey, kStr)
+                            writeInline("#S to ", kStr)
                             renderExpression(v)
                             ensureNewline()
                         }

codegen/smithy-kotlin-codegen/src/main/kotlin/software/amazon/smithy/kotlin/codegen/rendering/endpoints/DefaultEndpointProviderTestGenerator.kt

@@ -126,7 +126,7 @@ class DefaultEndpointProviderTestGenerator(
                             return@forEach
                         }
 
-                        writeInline("#T(#S) to ", RuntimeTypes.Core.Collections.AttributeKey, k)
+                        writeInline("#S to ", k)
                         renderExpression(Expression.fromNode(v))
                         ensureNewline()
                     }

codegen/smithy-kotlin-codegen/src/test/kotlin/software/amazon/smithy/kotlin/codegen/rendering/endpoints/DefaultEndpointProviderGeneratorTest.kt

@@ -217,13 +217,13 @@ class DefaultEndpointProviderGeneratorTest {
                     append("fooheader", "barheader")
                 },
                 attributes = attributesOf {
-                    AttributeKey("foo") to "bar"
-                    AttributeKey("fooInt") to 7
-                    AttributeKey("fooBoolean") to true
-                    AttributeKey("fooObject") to buildDocument {
+                    "foo" to "bar"
+                    "fooInt" to 7
+                    "fooBoolean" to true
+                    "fooObject" to buildDocument {
                         "fooObjectFoo" to "bar"
                     }
-                    AttributeKey("fooArray") to listOf(
+                    "fooArray" to listOf(
                         "\"fooArrayBar\"",
                     )
                 },

runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/collections/Attributes.kt

@@ -8,7 +8,7 @@ package aws.smithy.kotlin.runtime.collections
 /**
  * Specifies a key for an attribute
  *
- * @param T is the type of the vale stored in the attribute
+ * @param T is the type of the value stored in the attribute
  * @param name the name of the attribute (for diagnostics)
  */
 public data class AttributeKey<T>(public val name: String) {