Add param binding error check in auth scheme resolution to avoid panic (#619)

Author: wty-Bryant

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/auth/AuthParametersResolverGenerator.java

@@ -43,14 +43,14 @@ public GoWriter.Writable generate() {
         loadResolvers();
 
         return goTemplate("""
-                func $name:L(ctx $context:T, operation string, input interface{}, options Options) $params:P {
+                func $name:L(ctx $context:T, operation string, input interface{}, options Options) ($params:P, error) {
                     params := &$params:T{
                         Operation: operation,
                     }
 
                     $bindings:W
-
-                    return params
+                
+                    return params, nil
                 }
                 """,
                 MapUtils.of(
@@ -64,7 +64,11 @@ public GoWriter.Writable generate() {
     private GoWriter.Writable generateResolvers() {
         return (writer) -> {
             for (var resolver: resolvers) {
-                writer.write("$T(ctx, params, input, options)", resolver.resolver());
+                    writer.write("""
+                        if err := $T(ctx, params, input, options); err != nil {
+                            return nil, err
+                        }
+                    """, resolver.resolver());
             }
         };
     }

codegen/smithy-go-codegen/src/main/java/software/amazon/smithy/go/codegen/auth/ResolveAuthSchemeMiddlewareGenerator.java

@@ -70,7 +70,10 @@ private GoWriter.Writable generateBody() {
                 _, span := $3T(ctx, "ResolveAuthScheme")
                 defer span.End()
 
-                params := $1L(ctx, m.operation, getOperationInput(ctx), m.options)
+                params, err := $1L(ctx, m.operation, getOperationInput(ctx), m.options)
+                if err != nil {
+                    return out, metadata, $2T("bind auth scheme params: %w", err)
+                }
                 options, err := m.options.AuthSchemeResolver.ResolveAuthSchemes(ctx, params)
                 if err != nil {
                     return out, metadata, $2T("resolve auth scheme: %w", err)