fix!: Exposes a sync init for client configs (#957)

* Exposes a sync init for client configs

* regens models for new client config inits

* Fixes swiftlint issues

* regens models

Author: epau

Sources/Core/AWSClientRuntime/AWSClientConfiguration.swift

@@ -6,7 +6,7 @@
 import ClientRuntime
 
 public protocol AWSRuntimeConfiguration {
-    var credentialsProvider: CredentialsProvider { get set }
+    var credentialsProvider: CredentialsProviding { get set }
     var region: String? { get set }
     var signingRegion: String? {get set}
     var regionResolver: RegionResolver? {get set}