### 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_
headers = {
            "Content-Md5": content_md5,
            "Content-Type": "application/octet-stream",
            "User-Agent": (
                "aws-sdk-java/1.11.951 Mac_OS_X/10.15.7 OpenJDK_64-Bit_Server_VM/11.0.11+9-LTS "
                "java/11.0.11 scala/2.13.6 kotlin/1.5.31 vendor/Amazon.com_Inc."
            ),
            "X-Amz-Content-Sha256": "STREAMING-AWS4-HMAC-SHA256-PAYLOAD",
            "X-Amz-Date": "20211122T191045Z",
            "X-Amz-Decoded-Content-Length": str(len(_data)),
            "Content-Length": str(len(_data_chunked)),
            "Connection": "Keep-Alive",
            "Expect": "100-continue",
        }
        url = aws_client.s3.generate_presigned_url(
            "put_",
            Params={
                "Bucket": s3_bucket,
                "Key": _key,
                "ContentType": "application/octet-stream",
                "ContentMD5": content_md5,
            },
        )
        result = .put(url, data=_data_chunked, headers=headers)
        assert result.status_code == 200, (result, result.content)
    @pytest.mark.aws_validated
    @pytest.mark.skip_snapshot_verify(
        condition=is_old_provider, paths=["$..VersionId", "$..ContentLanguage"]
    )
    def test_delete__tagging(self, s3_bucket, snapshot, aws_client):