codegen: add support for addition Amazon S3 presigned URL operations (#1747)

Adds support for additional presigned URLs for S3 operations.
* HeadBucket
* DeleteObject
* DeleteBucket

Author: jasdel

.changelog/b9b99ba465154cc3a7e8e04101e46672.json

@@ -0,0 +1,8 @@
+{
+    "id": "b9b99ba4-6515-4cc3-a7e8-e04101e46672",
+    "type": "feature",
+    "description": "Add presign support for HeadBucket, DeleteObject, and DeleteBucket. Fixes [#1076](https://github.com/aws/aws-sdk-go-v2/issues/1076).",
+    "modules": [
+        "service/s3"
+    ]
+}

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/AwsHttpPresignURLClientGenerator.java

@@ -91,8 +91,13 @@ public class AwsHttpPresignURLClientGenerator implements GoIntegration {
             ShapeId.from("com.amazonaws.s3#AmazonS3"), SetUtils.of(
                     ShapeId.from("com.amazonaws.s3#GetObject"),
                     ShapeId.from("com.amazonaws.s3#PutObject"),
+
                     ShapeId.from("com.amazonaws.s3#UploadPart"),
-                    ShapeId.from("com.amazonaws.s3#HeadObject")
+
+                    ShapeId.from("com.amazonaws.s3#HeadObject"),
+                    ShapeId.from("com.amazonaws.s3#HeadBucket"),
+                    ShapeId.from("com.amazonaws.s3#DeleteObject"),
+                    ShapeId.from("com.amazonaws.s3#DeleteBucket")
             ),
             ShapeId.from("com.amazonaws.sts#AWSSecurityTokenServiceV20110615"), SetUtils.of(
                     ShapeId.from("com.amazonaws.sts#GetCallerIdentity"))