feat: S3 Express support

Sources/Core/AWSClientRuntime/Sources/AWSClientRuntime/Endpoints/EndpointResolverMiddleware.swift

@@ -55,7 +55,7 @@ extension AWSEndpointResolverMiddleware: ApplyEndpoint {
             let authScheme = try authSchemeResolver.resolve(authSchemes: schemes)
             signingAlgorithm = authScheme.name
             switch authScheme {
-            case .sigV4(let param):
+            case .sigV4(let param), .sigV4S3Express(let param):
                 signingName = param.signingName
                 signingRegion = param.signingRegion
             case .sigV4A(let param):

Sources/Core/AWSSDKCommon/Sources/AWSSDKCommon/FileBasedConfiguration/CRTFileBasedConfiguration.swift

@@ -46,13 +46,17 @@ extension CRTFileBasedConfiguration: FileBasedConfiguration {
         configFilePath: String? = nil,
         credentialsFilePath: String? = nil
     ) async throws -> CRTFileBasedConfiguration {
-        let task = Task {
-            try CRTFileBasedConfiguration.make(
-                configFilePath: configFilePath,
-                credentialsFilePath: credentialsFilePath
-            )
+        try await withCheckedThrowingContinuation { continuation in
+            do {
+                let fileBasedConfig = try CRTFileBasedConfiguration.make(
+                    configFilePath: configFilePath,
+                    credentialsFilePath: credentialsFilePath
+                )
+                continuation.resume(returning: fileBasedConfig)
+            } catch {
+                continuation.resume(throwing: error)
+            }
         }
-        return try await task.value
     }
 
     public func section(