### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

CopyObject API does not check precondition headers such as `x-amz-copy-source-if-modified-since`. Instead it seems to always copy the object.

### Expected Behavior

The API should return a 412 response with content similar to:

```
<Error><Code>PreconditionFailed</Code><Message>At least one of the pre-conditions you specified did not hold</Message><Condition>x-amz-copy-source-If-Modified-Since</Condition><RequestId>14HR9PXJRG5B1GR5</RequestId><HostId>HztBs2jYea1fzzPWo1JWy33NQJqo1S1IsK62rkbnVEI04PnGNCi8sPVrichGQxH3FQwLA2RIyF4=</HostId></Error>
```

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    docker run localstack/localstack

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

```
aws s3  --profile localstack --endpoint-url http://s3.localhost.localstack.cloud:4566 \
  ls s3://net-amazon-s3-test/Makefile.am
2023-01-25 10:47:40        537 Makefile.am

aws s3api copy-object --copy-source net-amazon-s3-test/Makefile.am --key Makefile.am.2 \
  --bucket net-amazon-s3-test2 --profile localstack --endpoint-url http://s3.localhost.localstack.cloud:4566 \
  --copy-source-if-modified-since "Wed, 25 Jan 2023 16:16:27 GMT"
{
    "CopyObjectResult": {
        "ETag": "\"46ada9d1fe8f8a311ff4504c226e061c\"",
        "LastModified": "2023-01-25T16:18:43+00:00"
    }
}
```

### Environment

```markdown
- OS: penguin
- LocalStack: latest
```


### Anything else?

_No response_
Key="index.html",
            Body="index",
            ContentType="text/html",
            ACL="public-read",
        )
        redirected_bucket_website = _website_bucket_url(bucket_name_redirected)
        response_no_redirect = .get(redirected_bucket_website, allow_redirects=False)
        assert response_no_redirect.status_code == 301
        assert response_no_redirect.content == b""
        response_redirected = .get(redirected_bucket_website)
        assert response_redirected.status_code == 200
        assert response_redirected.content == b"index"
        response = .get(bucket_website_url)
        assert response.status_code == 200
        assert response.content == b"index"
        assert response.content == response_redirected.content
        response_redirected = .get(f"{redirected_bucket_website}/random-key")
        assert response_redirected.status_code == 404
    @staticmethod
    def _get_static_hosting_transformers(snapshot):
        return [
            snapshot.transform.regex(
                "RequestId: (.*?)</li>", replacement="RequestId: <request-id></li>"
            ),
            snapshot.transform.regex("HostId: (.*?)</li>", replacement="HostId: <host-id></li>"),
            snapshot.transform.regex(
                "BucketName: (.*?)</li>", replacement="BucketName: <bucket-name></li>"
            ),
        ]
class TestS3Routing: